Magento 2 – Security Patch Not Working

I have tried to apply the following patch it works for me without any error,

Thanks & Regards,

To fix 500 errors in Magento 2, there could be multiple reasons:

• Permission Issue
• Memory Limitation Issue
• Version compatibility issue
• Third-party extension issue
• htaccess Issue

And more,

First, please enable the PHP error log and also the server log to check what actually the problem is.

you can still figure it out: please check the full documentation: https://www.cloudways.com/blog/magento-500-error/

For the upgrade please pull your code and check the composer json if it's updated with the current latest version so that the composer can upgrade the dependencies.

Thanks