Hello @stefan-s, I hope you are doing well today!
I am afraid that I can’t troubleshoot further because the Infinite Child theme is premium and I do not have access to it.
Please enable WordPress debugging by putting the following to the wp-config.php file:
define( 'WP_DEBUG', true );
define( 'WP_DEBUG_LOG', true );
define( 'WP_DEBUG_DISPLAY', false );
Make sure that you insert this line BEFORE /* That’s all, stop editing! Happy blogging. */ in the wp-config.php file.
Try to replicate this issue again, by clicking on the “Reset Password”. This way all errors will be saved in the debug.log file inside the /wp-content/ directory. Check the debug.log for any errors.
Post the errors you will see here.
Cheers,
Nastia