diff --git a/src/components/views/dialogs/ShareDialog.tsx b/src/components/views/dialogs/ShareDialog.tsx
index 06be765df56..a26e3068cc5 100644
--- a/src/components/views/dialogs/ShareDialog.tsx
+++ b/src/components/views/dialogs/ShareDialog.tsx
@@ -60,14 +60,29 @@ const socials = [
         url: (url: string) => `mailto:?body=${url}`,
     },
 ];
-
+// add doc strings to BaseProps
 interface BaseProps {
+    /**
+     * A function that is called when the dialog is dismissed
+     */
     onFinished(): void;
+    /**
+     * An optional string to use as the dialog title.
+     * If not provided, an appropriate title for the target type will be used.
+     */
     customTitle?: string;
+    /**
+     * An optional string to use as the dialog subtitle
+     */
     subtitle?: string;
 }
 
 interface Props extends BaseProps {
+    /**
+     * The target to link to.
+     * This can be a Room, User, RoomMember, or MatrixEvent or an already computed URL.
+     * A <u>matrix.to</u> link will be generated out of it if its no already a computed url.
+     */
     target: Room | User | RoomMember | URL;
     permalinkCreator?: RoomPermalinkCreator;
 }
diff --git a/src/components/views/rooms/RoomHeader.tsx b/src/components/views/rooms/RoomHeader.tsx
index 2fa194fcfbd..8ca26ebcdea 100644
--- a/src/components/views/rooms/RoomHeader.tsx
+++ b/src/components/views/rooms/RoomHeader.tsx
@@ -83,6 +83,7 @@ export default function RoomHeader({
         toggleCallMaximized: toggleCall,
         isViewingCall,
         generateCallLink,
+        canGenerateCallLink,
         isConnectedToCall,
         hasActiveCallSession,
         callOptions,
@@ -124,15 +125,16 @@ export default function RoomHeader({
     const videoClick = useCallback((ev) => videoCallClick(ev, callOptions[0]), [callOptions, videoCallClick]);
 
     const shareClick = useCallback(() => {
-        const target = generateCallLink ? generateCallLink() : undefined;
-        if (target) {
+        try {
+            // generateCallLink throws if the permissions are not met
+            const target = generateCallLink();
             Modal.createDialog(ShareDialog, {
                 target,
                 customTitle: _t("share|share_call"),
                 subtitle: _t("share|share_call_subtitle"),
             });
-        } else {
-            logger.error("Could not generate call link.");
+        } catch (e) {
+            logger.error("Could not generate call link.", e);
         }
     }, [generateCallLink]);
 
@@ -333,7 +335,7 @@ export default function RoomHeader({
                             </Tooltip>
                         );
                     })}
-                    {isViewingCall && generateCallLink && createExternalLinkButton}
+                    {isViewingCall && canGenerateCallLink && createExternalLinkButton}
                     {((isConnectedToCall && isViewingCall) || isVideoRoom(room)) && <VideoRoomChatButton room={room} />}
 
                     {hasActiveCallSession && !isConnectedToCall && !isViewingCall ? (
diff --git a/src/hooks/room/useRoomCall.ts b/src/hooks/room/useRoomCall.ts
index df445e6e5a2..92f350087fb 100644
--- a/src/hooks/room/useRoomCall.ts
+++ b/src/hooks/room/useRoomCall.ts
@@ -80,7 +80,8 @@ export const useRoomCall = (
     videoCallClick(evt: React.MouseEvent | undefined, selectedType: PlatformCallType): void;
     toggleCallMaximized: () => void;
     isViewingCall: boolean;
-    generateCallLink: (() => URL) | undefined;
+    generateCallLink: () => URL;
+    canGenerateCallLink: boolean;
     isConnectedToCall: boolean;
     hasActiveCallSession: boolean;
     callOptions: PlatformCallType[];
@@ -271,7 +272,8 @@ export const useRoomCall = (
     }, [isViewingCall, room.roomId]);
 
     const generateCallLink = useCallback(() => {
-        // Should never happen, because the hook only passes generateCallLink if externalSpaUrl is set.
+        if (!canJoinWithoutInvite)
+            throw new Error("Cannot create link for room that users can not join without invite.");
         if (!guestSpaUrl) throw new Error("No guest SPA url for external links provided.");
         const url = new URL(guestSpaUrl);
         url.pathname = "/room/";
@@ -288,7 +290,7 @@ export const useRoomCall = (
 
         logger.info("Generated element call external url:", url);
         return url;
-    }, [guestSpaUrl, room]);
+    }, [canJoinWithoutInvite, guestSpaUrl, room]);
     /**
      * We've gone through all the steps
      */
@@ -299,7 +301,8 @@ export const useRoomCall = (
         videoCallClick,
         toggleCallMaximized: toggleCallMaximized,
         isViewingCall: isViewingCall,
-        generateCallLink: guestSpaUrl && canJoinWithoutInvite ? generateCallLink : undefined,
+        generateCallLink,
+        canGenerateCallLink: guestSpaUrl !== undefined && canJoinWithoutInvite,
         isConnectedToCall: isConnectedToCall,
         hasActiveCallSession: hasActiveCallSession,
         callOptions,