You need to enable the PHP Intel extension. It however, may be, that you may run into other problems using OJS 3.3.0-14 with PHP 8.1 - we found it not to be compatible:
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You need to enable the PHP Intel extension. It however, may be, that you may run into other problems using OJS 3.3.0-14 with PHP 8.1 - we found it not to be compatible: