Welcome to the community
May I know the version of the application you are currently using (Postman > About)? We have had few issues with the recent versions of the app and hence we have released a fix in a new version 7.21.2: https://www.postman.com/downloads/release-notes.
We highly encourage you to update the app or download the latest version from this link here. In the event that the issue persists after the update to version 7.21.2, please let us know
I installed version 7.21.2, it continues to display the black screen.
Thank you! Can you check this response below and let us know if following steps from the article help?
ok PROBLEM SOLVED i have Disabling GPU.