Version of the plugin is not compatible with PHP 7.4 and phpunit 9.5

That’s not a typical error log. Where do you have this from?

And where do you see “not compatible with PHP 7.4 and phpunit 9.5”?

We are using a Codeship Builder, and it’s set up to check compatibility for our sites. It’s set up for PHP 7.4 and phpunit 9.5.

We are stuck on version 15.7 due this issue

The Pixel Manager is compatible with PHP 7.4.

Your check is wrong.

Also, there is no need to check and verify if the Pixel Manager is compatible with PHPUnit 9.5, because you don’t run that in production.