Hi is ccomment compatible with php 8.1?

Every time someone posts a comment, all pages with ccomment on get this critical error.

0 - Call to undefined function escapeshellcmd()
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Call to undefined function escapeshellcmd()

The only way to clear this error is to revert back to php 7.4

I even tried installing a fresh copy of the free version just in case my old pro version was too out of date, but it's the same.