I have no idea what you are talking about. You need to explain what you actually did. The warning is probably a fluke due to your using a combination of features in a way they are not intended to be used.
Welcome to the Community and sorry for your issue.
As Mylenium mentioned, please share more details on your workflow along with your system specifications (CPU, GPU, RAM, OS) so that we can understand the issue better and help you to troubleshoot. In the meantime, you can try resetting the preference and purging memory (go to Edit > Purge > All Memory and Disk Cache).