Hello,

Firstly, we want to Apologize for all the inconvenience caused.

Secondly, regarding your mentioned concern we have checked it further and found out that the Critical Error that is occurring on your Site upon Child Theme activation is due to the Customization done in the Child Theme, here you can check out the Error log: https://ibb.co/8x1whF4

This clears the fact that it is specifically a Customization concern on your Site because we have confirmed from the Test Site, the Child Theme is working fine with the PHP version 7.4 and greater.

So, you can please once delete the Child Theme on your Site > and then recreate it and then check back the issue again. Hopefully, you won’t have any issues by then.

Note: For the checking process, when we activated the Child Theme on your Site, it showed the Critical Error so we weren’t able to access the WP-ADMIN again and in your provided FTP Login details, you didn’t provided the FTP Host Name so we are unable to proceed further.

Hope you can understand !

Best Regards