I can export my project because I have no space , but I have!

Can you send the logs to the support team for review? help@topazlabs.com

To gather logs, please select Help > Logging > Get Logs for Support and attach the zip file to your reply.

Here is a video to help with the steps of how to collect the logs.

Most likely, the temp file location is being filled up, and that is triggering this situation.