How to find OJS version with erro 500

How can I identify OJS version, I have a OJS instalation with error 500 problem. So I can’t identify the version.

This is the error: PHP Fatal error: require_once(): Failed opening required ‘lib/pkp/classes/cache/’

I would like to upload OJS again.

I also want to know how

If you have access to the database, you can find it as I have shown in the image below.