Settings: External Services "API Request Failed"

Ubuntu 20.04
Nextcloud 22.2.3
PHP 8.0.12

Okay so I am setting up a new Nextcloud server from scratch (sick of relying on Snap/Docker). I have gotten to the portion where I am setting up Passwords. Unfortunately, every time I look to switch the settings on external services - for example: favicon → Besticon - I get the above-referenced “API Request Failed.”

I’ve been through the Wiki and can’t see where I may have missed a step. Any suggestions?

Thank you!

Can you check if there is anything related in the error logs of nextcloud?