[bug] Clicking 'Fetch Metadata' hangs the application

[ak-42]

Describe the bug
Clicking 'Fetch Metadata' for a book hangs the application, necessitating container restart.

To Reproduce
Steps to reproduce the behavior:

1. Open the application
2. Select any book
3. Click 'Edit Metadata'
4. Click 'Fetch Metadata'
5. 'Fetch Metadata' window appears, and hangs on 'Loading' and eventually says 'Serch Error'
6. Application no longer responsive on browser refresh or in another tab (container restart required)

Expected behavior
The metadata is fetched and offered to the user.

Screenshots
Nothing informative appears in the 'Fetch Metadata' windows, so I won't screenshot that.

Configuration(please complete the following information):

• OS: Docker Compose
• Hardware: x86 N100 machine, 16GB RAM
• Version :latest tag

Additional context
Neither the calibre-web logs (on DEBUG level), nor the container logs themselves show anything relevant/out of ordinary, which is why I'm not attaching them.

Presents similarly to janeczku/calibre-web#2562, but in this case as best as I can tell, the API is not down (and it doesn't even let me unselect APIs as the users in that issue suggest).

[mckenna654]

Also getting this issue