Your problem is likely caused by Norton. Mac OS is extremely elegant and secure and does not benefit from or require ANY third party antivirus, cleaning or ANY other third party apps to maintain itself. If simply left alone and kept up to date Mac OS will run with stability for years for most users. When users intervene by being misguided and adding antivirus apps and other worthless (and potentially damaging) apps to Mac OS this is when their Mac begin to exhibit problems.
Unfortunately Norton and other Symantec solutions are among the worst for Mac OS.
My advice is to click the following link and follow the directions: https://support.norton.com/sp/en/us/home/current/solutions/v64924250
If you have other similar apps, please do the same, locate the developers instruction to uninstall their app and follow them. With luck you have not damaged Mac OS.
Good luck.