"Column name must be either a string or an array" error.


I had Mailwizz migrated from an old VPS server to another one on Cloudways.
The application's back office is working normally, but not the customer one.

There is an error when clicking on the "Impersonate customer" button.

And also. when trying to access the customer login page:
>> http://pantikamail.net/customer/index.php/guest/index

This is the error:

Screen Shot 2020-01-21 at 7.52.42 AM.png

Error 500!
Column name must be either a string or an array.

The database was previously on MySQL while it is now on MariaDB, maybe that's the reason?
I also updated my IP for the app on the MailWizz website.

Tech support at Cloudways have done everything they can to help fix it, re-migrating the app, re-importing the database, but that does not work.

Any idea of how to fix this?

Thank you very much,

I think there's something wrong with the database, can you open a support ticket and include FTP access so we can take a look?