Easymorph server started giving me this error for Excel actions. I'm currently on 5.6.0.2
I can run the model successfully with the desktop application on that same server. It's just running the model from the server UI that I get the error.
I followed the steps indicated above, but it didn't mitigate the issue. The described error always occurs when running the logic automatically, or when running it manually the first time. When I execute the action manually, after the error popped up for the first time, it works.
This thread is about Server issues, but your screenshot shows Desktop. If your issue isn't connected to the Server, let's continue the conversation in the other topic you just created.