Hi,
I got this issue (UiPath.OutOfProcessUi.ServerHost.exe) when trying to use Forms activities(v.1.9.6) and I just followed this topic with no solution.
I’ve found UiPAth redirects you to .Net runtime v.5 and finally I’ve solved by installing the whole .Net v.5 version instead.
I post it JIC, to help anyone else
HUG!