Problem with Envato Market WordPress Plugin

I have istalled the latest Envato Market WordPress Plugin but when I activate it I get a critical error on my site. So I have to restore the database but I can’t update the envato theme (PHP is up to date as the other extensions).
Do you have any idea about this problem.

Depending on the issue, the plugin may be activated/enabled on another theme.
What’s the error message you’re getting?

I have only one site and the message after activating the plugin is as follow : “A critical error has occurred on this site. Please check your site administration email inbox for more information.” No further explanation and no email in my administration inbox.

You can check server error.log
Which version of PHP are you using? Maybe you should lower the version