Com.miui.securitycenter -

Scans for "garbage" files, including cache, obsolete APKs, and temporary files that take up storage space.

While you shouldn't disable it, you can ensure it isn't running "Auto-start" in the permissions menu to reduce its footprint. Security Concerns and Permissions com.miui.securitycenter

Provide the exact error or your device model to get more tailored troubleshooting steps. Scans for "garbage" files, including cache, obsolete APKs,