Installing theme’s required plugin show critical error in Multisite

I’m having issues with a theme that needs a plugin when I install it I get a fatal error
There has been a critical error on your website. Please check your site admin email inbox for instructions.

I see this in Error Log
[14-May-2020 07:46:05 UTC] PHP Fatal error: Uncaught Error: Call to a member function add_cap() on null in /var/web/site/public_html/wp-content/plugins/cariera-plugin-off/inc/extensions/dashboard/my-account.php:390