Error message ”Failed to add window command bar extensions”


I have this issue when trying to open Studio 2019 - the following message pops up:
”Failed to add window command bar extensions”. I tried this workaround, but unfortunately it did not work. I have also uninstalled and reinstalled Studio and Multiterm, but the message still pops up and I cannot open the program. The same thing happens with Studio 2017 that I still have on my computer. Any suggestions?
Thank you!