SOLUTION that I found is. Settings > Apps > Default Apps > Home App > and choose the launcher that hasn't been crashing for me this is "System Launcher" instead of "OnePlus launcher".
Whenever I try and give it permission, it says that there's an app blocking it, and to try and turn off ball assistant or any other functions. I have an oppo a72, I really don't understand this issue, it was working fine a moment ago.
@@kumarirajni3970 I actually fixed it myself through someone on a Reddit forum, if you go into your settings there may be something called 'Smart Side-bar', turn that off and it should go back to normal. It worked for my phone, same model I mentioned before.