Get An Internal Error Has Occurred. when trying to "load default feed metadata" on Feeds page

[ntaken]

Have put up a new container and set up a accompanying reverse proxy. Trying out misp for the first time.

Followed the instructions for a production environment.

When I try pressing the button for "load default feed metadata" on Feeds page. I get an error.

An Internal Error Has Occurred.

Error: An Internal Error Has Occurred. Please try your action again. If the problem persists, please contact administrator.

Anyone know what has gone wrong?