problem updating 3.0.3.1 to 3.0.3.2 - HTTP Error 500

I try to update via Softaculus from version 3.0.3.1 to version 3.0.3.2
I made the procedure step by step. I also make a backup.

I have cleared cookies, browser, Ctrl+F5 etc etc. I also try from different browser.

The page is not appearing and shows HTTP Error 500

If restore the backup to previous version, then it's all OK.

why is this happening ?
what step must do to solve this ?

what step must do to solve this ?

To check your server access logs regarding the error 500 codes. 500 means that there was an internal server error response during the requests.