EQ plug-in could not be found after upgrading to Cubase 15

I upgraded to Cubase 15 and when i open files from version 13, this message comes up. Any help would be appreciated, thank you.

Is it possible that is a VST2 plug-in? They are not enabled by default from Cubase 14 onwards. You can enable VST2 plugins in Plugin Manager if needed.

Hi and welcome to the forum,

Try to reinstall Cubase 15 and the whole content, as administrator, please.