K1527781911035 , via OnePlus 6 , Jun 16, 2020 : Today I installed a new apk for camera which is of latest version 5.4.10. Now when I am trying to open the camera, it's not working at all. Also, I tried to installed to older apk version for camera. I'm not able to install that as well as I'm getting error "App not installed" while installing the older apk. Please let me know which version was installed earlier and the steps for installing older apk.