Here are our suggestions for you:
The best way is to roll-back the backup.
If you didn't create restore point, try disabling Mageplaza extensions by module:disable command. With normal setup, the command will look something like this: php bin/magento module:disable where you can get by running php bin/magento module:status
Before sending a ticket, please make sure you followed all the steps we described in our Installation Guide
With Free extensions, look up for your issues in our Github repository first:
When sending us a ticket, please describe the issues as much detail as possible. Including screenshots, Zipping the var/log folder, upload to online storage services such as drive, Dropbox and share it with us if possible.
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