What is "one or more errors occurred"

[cewong]

I presume you have updated from 2018.2.4 or 2.3.
You may be running an old UiROBOT version versus the UiStudio is the latest version.
A restart may do the trick but the cause is partly related to the shortcuts created by previous version that invokes older robot.

A quick workaround for me was to invoking UiPath.Studio.exe and UiRobot.exe in 18.3.2 folder.
Hope this helps. Been awhile I’m away from UiPath forum.