"Something went wrong" error when new users try to set their password

Hello!

We have installed a gancio instance. When testing it we have a problem. New users get their welcome email message correctly, but when following the link to set their password, gancio gives them a "Something went wrong." red banner. See attached imagegancio-something_went_wrong

Any suggestion on where to start troubleshooting?

Edited by A mz