Matrix client error when downloading attachments from discord/whatsapp bridge

[kqvanity]

I use a custom server (A cloud platform hosting a whatsapp-bridge among others)

When I attempt to

• Inspect a space
  I get the following error HTTP client error: the server returned an error: [403 / M_FORBIDDEN] User @kqvanity:beeper.com not in room !GlX2emKp0oONolaIJWRd:beeper.local, and room previews are disabled
• Download media
  I get an error message saying Matrix client error: invalid Matrix Content URI: Media Identifier malformed, invalid characters

The logs (currently set to error), but the respective log day contains nothing.