Not able to install APK after removing the device from Intune company portal

After enrolling my Android device in the Intune company portal, I removed it from the company portal. Now, if I install any APK from other sources downloaded via Chrome, it keeps saying > Unkown apps can't be installed by this user. I tried to go to Settings -> Install unknown apps -> Files by Google -> Allowed, still the same error. Device admin apps are all off. Still getting the same error. --- This may answer it: https://support.google.com/pixelphone/thread/249737257/unknown-apps-can-t-be-installed-by-this-user