How to solve this problem?

I am trying to upgrade OJS from to
I followed the instructions but the database update fails, it does not give an error, just goes to a blank screen and does not do the upgrade.
I am left with a half updated system at present.
Can anyone help?

Hi @joshita

If you’re getting a blank white screen, that is usually a PHP fatal error, and there will be an error in your Apache error log.

If the upgrade is not completing, you’ll need to restore your database from a backup, from before the upgrade first ran, figure out what the PHP error is, and try again.