Getting 500 error when opening contact

Hi. I am using the muatic hosted solution but haven’t used it in a month. I am now getting going but when I go to edit a contact or try to create a new contact, I get the error page " Uh oh! I think I broke it. If I do it again, please report me to the system administrator! 500 Internal Server Error"



Any ideas

Hi. I am using the muatic hosted solution but haven’t used it in a month. I am now getting going but when I go to edit a contact or try to create a new contact, I get the error page " Uh oh! I think I broke it. If I do it again, please report me to the system administrator! 500 Internal Server Error"

Any ideas