OJS Plugin Upgrade Error

I have upgraded the journal to When I am trying to upgrade any of the plugins, I get an error notification as null. As a result I am unable to add any theme.

I tried to install the theme manually, its showing but not getting populated in the theme dropdown under appearance.

Screenshot 2020-06-25 at 6.20.37 PM

Hi @Vinit_Kumar_Gunjan,

See e.g. Plugin Issue After upgradation of 3.2.03 to

Alec Smecher
Public Knowledge Project Team