A server error occurred while trying to process the form.

Do you find something to fix this bug, I have the same.
Thanks. Nico

Nope, no longer using this plugin.

Thanks for feedback. Wich other ?

Do you find something to fix this bug, I have the same.

Hello,All.

This is 500 server error. The reasons can be different. Try to check error log what particular causing this issue.
Try also to deactivate all third party plugins to investigate the issue.

Regards.