Cubase 11.0.41 freezing

If I do any midi edits, cubase freezes while playing back when it reaches the edited part. Have done all the troubleshooting. please help!!

Can you please define “all the troubleshooting”

Everything that has been suggested over 21 years using cubase, including RE installing windows10 and then cubase. It must be a conflict with vst3’s as I have a lot. I work completely in the box. Can you help me figure out what the conflict is?