Help me please
What type of file were you trying to view? Is it reproducible?
PDF PPTX and reproducible.
Do they display OK in File Explorer's viewer pane?
Which software is installed to view those files? (The ActiveX plugin only acts as a bridge between other software and Opus; e.g. Adobe Reader. You may need to update/repair the other software if it is crashing when displaying files.)
I cheked with adobe reader, foxit , xchange viewer but not working!!
In Explorer or Opus, or both?
What did you try? Reinstalling them? What happens?
I reinstall opus and now .pdf and .doc is good but pptx view "shell icon" yet.
I have office 2019 and windows 10 and pptx in explorer is ok.