diff --git a/scripts/build/package.ts b/scripts/build/package.ts
index 4ffc59484e1..84aacf01c39 100644
--- a/scripts/build/package.ts
+++ b/scripts/build/package.ts
@@ -24,7 +24,7 @@ import * as fs from 'fs-extra'
 import { betaUrl } from '../../src/dev/config'
 
 const packageJsonFile = './package.json'
-const webpackConfigJsFile = './webpack.config.js'
+const webpackConfigJsFile = './webpack.base.config.js'
 
 function parseArgs() {
     // Invoking this script with argument "foo":
diff --git a/src/auth/providers/credentialsProviderManager.ts b/src/auth/providers/credentialsProviderManager.ts
index 44c3da81344..70f71e7a90d 100644
--- a/src/auth/providers/credentialsProviderManager.ts
+++ b/src/auth/providers/credentialsProviderManager.ts
@@ -32,9 +32,7 @@ export class CredentialsProviderManager {
                 telemetry.aws_loadCredentials.emit({ credentialSourceId: telemType, value: 1 })
                 providers = providers.concat(provider)
             } else {
-                getLogger().verbose(
-                    `provider for ${provider.getCredentialsId().credentialTypeId} unavailable in this environment`
-                )
+                getLogger().verbose('auth: "%s" provider unavailable', provider.getCredentialsId().credentialTypeId)
             }
         }
 
diff --git a/src/auth/providers/sharedCredentialsProviderFactory.ts b/src/auth/providers/sharedCredentialsProviderFactory.ts
index c79da03cdbc..7a8ea49f62e 100644
--- a/src/auth/providers/sharedCredentialsProviderFactory.ts
+++ b/src/auth/providers/sharedCredentialsProviderFactory.ts
@@ -47,18 +47,17 @@ export class SharedCredentialsProviderFactory extends BaseCredentialsProviderFac
     private async loadSharedCredentialsProviders(): Promise<void> {
         this.resetProviders()
 
-        this.logger.verbose('Loading all Shared Credentials Sections')
         const result = await loadSharedCredentialsSections()
         if (result.errors.length > 0) {
             const errors = result.errors.map(e => e.message).join('\t\n')
-            getLogger().verbose(`credentials: errors occurred while parsing:\n%s`, errors)
+            getLogger().warn(`credentials: errors while parsing:\n%s`, errors)
         }
 
         this.loadedCredentialsModificationMillis = await this.getLastModifiedMillis(getCredentialsFilename())
         this.loadedConfigModificationMillis = await this.getLastModifiedMillis(getConfigFilename())
         await updateAwsSdkLoadConfigEnvVar()
 
-        getLogger().verbose(`credentials: found sections: ${result.sections.map(s => `${s.type}:${s.name}`)}`)
+        getLogger().verbose(`credentials: found sections: ${result.sections.map(s => `${s.type}:${s.name}`).join(' ')}`)
         for (const section of result.sections) {
             if (section.type === 'profile') {
                 await this.addProviderIfValid(
diff --git a/src/auth/sso/cache.ts b/src/auth/sso/cache.ts
index 2154761b0fb..b245068817d 100644
--- a/src/auth/sso/cache.ts
+++ b/src/auth/sso/cache.ts
@@ -46,7 +46,7 @@ export function getRegistrationCache(directory = getCacheDir()): KeyedCache<Clie
     const read = (data: StoredRegistration) => ({ ...data, expiresAt: new Date(data.expiresAt) })
     const write = (data: ClientRegistration) => ({ ...data, expiresAt: data.expiresAt.toISOString() })
 
-    const logger = (message: string) => getLogger().debug(`SSO registration cache: ${message}`)
+    const logger = (message: string) => getLogger().debug('auth: SSO registration cache: %s', message)
     const cache: KeyedCache<StoredRegistration, RegistrationKey> = createDiskCache(
         (registrationKey: RegistrationKey) => getRegistrationCacheFile(directory, registrationKey),
         logger
diff --git a/src/auth/sso/ssoAccessTokenProvider.ts b/src/auth/sso/ssoAccessTokenProvider.ts
index 03dc93f671b..b616e4116f7 100644
--- a/src/auth/sso/ssoAccessTokenProvider.ts
+++ b/src/auth/sso/ssoAccessTokenProvider.ts
@@ -75,9 +75,10 @@ export class SsoAccessTokenProvider {
     ) {}
 
     public async invalidate(): Promise<void> {
-        await Promise.all([
-            this.cache.token.clear(this.tokenCacheKey),
-            this.cache.registration.clear(this.registrationCacheKey),
+        // Use allSettled() instead of all() to ensure all clear() calls are resolved.
+        await Promise.allSettled([
+            this.cache.token.clear(this.tokenCacheKey, 'SsoAccessTokenProvider.invalidate()'),
+            this.cache.registration.clear(this.registrationCacheKey, 'SsoAccessTokenProvider.invalidate()'),
         ])
     }
 
@@ -114,7 +115,7 @@ export class SsoAccessTokenProvider {
             return await this.authorize(registration)
         } catch (err) {
             if (err instanceof SSOOIDCServiceException && isClientFault(err)) {
-                await this.cache.registration.clear(cacheKey)
+                await this.cache.registration.clear(cacheKey, `client fault: SSOOIDCServiceException: ${err.message}`)
             }
 
             throw err
@@ -141,7 +142,10 @@ export class SsoAccessTokenProvider {
                 } as AwsRefreshCredentials)
 
                 if (err instanceof SSOOIDCServiceException && isClientFault(err)) {
-                    await this.cache.token.clear(this.tokenCacheKey)
+                    await this.cache.token.clear(
+                        this.tokenCacheKey,
+                        `client fault: SSOOIDCServiceException: ${err.message}`
+                    )
                 }
             }
 
diff --git a/src/shared/utilities/cacheUtils.ts b/src/shared/utilities/cacheUtils.ts
index 76ed6ffd0fc..07185e1949e 100644
--- a/src/shared/utilities/cacheUtils.ts
+++ b/src/shared/utilities/cacheUtils.ts
@@ -33,11 +33,12 @@ export interface KeyedCache<T, K = string> {
     save(key: K, data: T): Promise<void>
 
     /**
-     * Removes the data stored at {@link key}, if any.
+     * Deletes data stored at {@link key}, if any.
      *
      * @param key Target key to clear.
+     * @param reason Partial log message explaining why the data is being deleted.
      */
-    clear(key: K): Promise<void>
+    clear(key: K, reason: string): Promise<void>
 }
 
 /**
@@ -71,7 +72,7 @@ export function mapCache<T, U, K>(cache: KeyedCache<T, K>, get: (data: T) => U,
     const getIf = (data?: T) => (data !== undefined ? get(data) : undefined)
 
     return {
-        clear: key => cache.clear(key),
+        clear: (key, reason) => cache.clear(key, reason),
         load: key => cache.load(key).then(getIf),
         save: (key, data) => cache.save(key, set(data)),
     }
@@ -91,10 +92,10 @@ export function createDiskCache<T, K>(
     mapKey: (key: K) => string,
     logger?: (message: string) => void
 ): KeyedCache<T, K> {
-    function log(prefix: string, key: K): void {
+    function log(msg: string, key: K): void {
         if (logger) {
             const keyMessage = typeof key === 'object' ? JSON.stringify(key) : key
-            logger(`${prefix} for key '${keyMessage}'`)
+            logger(`${msg} key: ${keyMessage}`)
         }
     }
 
@@ -104,11 +105,11 @@ export function createDiskCache<T, K>(
 
             try {
                 const result = JSON.parse(await SystemUtilities.readFile(target))
-                log('load succeeded', key)
+                log('loaded', key)
                 return result
             } catch (error) {
                 if (isFileNotFoundError(error)) {
-                    log('load missed', key)
+                    log('read failed (file not found)', key)
                     return
                 }
 
@@ -131,16 +132,16 @@ export function createDiskCache<T, K>(
                 })
             }
 
-            log('save succeeded', key)
+            log('saved', key)
         },
-        clear: async key => {
+        clear: async (key, reason) => {
             const target = mapKey(key)
 
             try {
                 await SystemUtilities.delete(target)
             } catch (error) {
                 if (isFileNotFoundError(error)) {
-                    return log('clear succeeded, file does not exist', key)
+                    return log('file not found', key)
                 }
 
                 throw ToolkitError.chain(error, `Failed to delete "${target}"`, {
@@ -149,7 +150,7 @@ export function createDiskCache<T, K>(
                 })
             }
 
-            log('clear succeeded', key)
+            log(`deleted (reason: ${reason})`, key)
         },
     }
 }
@@ -158,9 +159,9 @@ export function createSecretsCache(
     secrets: vscode.SecretStorage,
     logger?: (message: string) => void
 ): KeyedCache<string> {
-    function log(prefix: string, key: string): void {
+    function log(msg: string, key: string): void {
         if (logger) {
-            logger(`${prefix} for key '${key}'`)
+            logger(`${msg} key: ${key}`)
         }
     }
 
@@ -170,11 +171,11 @@ export function createSecretsCache(
                 const value = await secrets.get(key)
 
                 if (value === undefined) {
-                    log('load missed', key)
+                    log('read failed (key not found)', key)
                     return
                 }
 
-                log('load succeeded', key)
+                log('loaded', key)
                 return value
             } catch (error) {
                 throw ToolkitError.chain(error, 'Failed to get value from secrets storage', {
@@ -193,9 +194,9 @@ export function createSecretsCache(
                 })
             }
 
-            log('save succeeded', key)
+            log('saved', key)
         },
-        clear: async key => {
+        clear: async (key, reason) => {
             try {
                 await secrets.delete(key)
             } catch (error) {
@@ -205,7 +206,7 @@ export function createSecretsCache(
                 })
             }
 
-            log('clear succeeded', key)
+            log(`deleted (reason: ${reason})`, key)
         },
     }
 }
diff --git a/tsconfig.json b/tsconfig.json
index 2818170e3c5..d5b53761c57 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -7,7 +7,7 @@
         },
         "incremental": true,
         "module": "commonjs",
-        "target": "es6",
+        "target": "es2021",
         "outDir": "dist",
         "sourceMap": true,
         "moduleResolution": "node",
@@ -16,7 +16,7 @@
         "strict": true,
         "noUnusedLocals": true,
         "noImplicitOverride": true,
-        "lib": ["dom", "es6", "esnext.asynciterable"],
+        "lib": ["dom", "es2021"],
         "skipLibCheck": true,
         "forceConsistentCasingInFileNames": true,
         "jsx": "preserve",
diff --git a/webpack.base.config.js b/webpack.base.config.js
index 2df0bfa20b7..d22c2b560bf 100644
--- a/webpack.base.config.js
+++ b/webpack.base.config.js
@@ -69,7 +69,7 @@ const baseConfig = {
                         loader: 'esbuild-loader',
                         options: {
                             loader: 'ts',
-                            target: 'es2018',
+                            target: 'es2021',
                         },
                     },
                 ],
@@ -94,7 +94,7 @@ const baseConfig = {
         minimize: true,
         minimizer: [
             new ESBuildMinifyPlugin({
-                target: 'es2018',
+                target: 'es2021',
             }),
         ],
     },