@PankushSI cannot really tell from that message alone. I would look at the PegaRobotStudio.log located in %AppData%\Pegasystems\Logs. You might need to locate the error and work backwards to try to figure out what is happening. If you cannot figure it out, you can open a support request and provide them your project to look at. If your project is OK to publicly share, then you can post it here and I can take a look at it.