Publishing Error: "Error: Object reference not set to an instance of an object."

“Error: Object reference not set to an instance of an object.”

I get this error when publishing a bot to Orchestrator. I did the Project Validation and it had no errors. And after this publishing it, I get this error. There was another posting on this topic, but their issue was a %20 (encoded space) in the filename. I don’t have any spaces or the encoded characters in my workflow filenames.

Please help.