This started happening after I changed to URP , also note that the project is old from 2015 and was made in editor 5.3.1f, I changed the editor version to latest 2021 LTS community version, all other scenes are working fine with URP except this one I also tried stacking the cameras but it didn't fix the issue

CodePudding user response：

Well I Solved the problem ! it was the Environmental settings under the lightning settings, I just changed the skybox material to none and that solved the issue ,I think it wasn't in some way compatible with URP