No alternative tileServer is able to render

[jacopok]

Check for existing bug reports before submitting.

• I searched for existing Bug Reports and found no similar reports.

Specifically, I looked through all issues with the keywords "render" or "tileServer" and found nothing seemingly related. Apologies if I missed something.

Expected Behavior

I expect to see something when I use the alternative tileServers exemplified in the README.
Eventually, I would like to render a real-world map showing terrain, and I wanted to look through my options.

Current behaviour

When I try to add some new tileServer I see no map, only a grey backdrop: see attached video.

Screencast.2024-05-09.12.34.13.mp4

Reproduction

The issue should be reproducible by creating a new vault with only the Leaflet plugin installed, and a single note with the following code:

```leaflet
id: bug-report
tileServer:
-   https://{s}.basemaps.cartocdn.com/dark_all/{z}/{x}/{y}{r}.png|Dark
-   https://tiles.wmflabs.org/hillshading/{z}/{x}/{y}.png|Hills
```

Which Operating Systems are you using?

• Android
• iPhone/iPad
• Linux
• macOS
• Windows

Obsidian Version Check

1.5.12 and 1.4.13

Plugin Version

6.0.5

Confirmation

• I have disabled all other plugins and the issue still persists.

Possible solution

I think either I am misinterpreting something in the documentation about how to access tile servers, or it is a problem with those servers themselves. Either way, I don't know how to diagnose the issue and would be happy to hear some steps I can try (or whether this is expected behaviour).