Hello jasko81,
This could be due to a multitude of reasons so let’s try to narrow it down as much as possible. First, can you provide the log file itself from one of these failed attempts? While I understand that it most likely never gives you an error message and just endlessly packages, having the information from the log would still be useful. You can find it in the form of a text file in your project’s directory under Saved/Logs.
After that, could you upload your DxDiag information? We’ve had a few issues similar to this in the past that were related to processor speed and other hardware issues, so it would be nice to take a look at this as well.