PopUp - File was deleted /private/var/.MultiplySearch/MultiplySearch

I keep getting a constant pop saying "File was deleted/private/var/.MultiplySearch/MultiplySearch. What does it mean and now do I stop it from popping up?

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By rebooting the Mac, you will activate Mac OS X’s built-in cache cleanup functions at startup and the unnecessary content, caches and temporary items in / private /, / var / and / var / folders / will delete themselves as necessary deemed by the Mac. This allows the operating system to search the temporary files and caches and determine what is needed and what is not, eliminating the vast majority of things built up in there, especially if the Mac hasn’t restarted for a long time, if you’ve recently deleted a bunch of apps or performed a variety of other system actions.
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https://www.compsmag.com/how-to/remove-temporary-items-bloated-private-var-folders-on-mac-os-safe-way/ 

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DO NOT BLINDLY DELETE anything in /private/var, or you may break something OS X is depending on.

https://discussions.apple.com/thread/7402978 


source ~ google: how to clean private/var files on mac

Remove MultiplySearch browser hijacker (Virus Removal Guide)
https://malwaretips.com/blogs/remove-multiplysearch/ - September 23, 2020 

Malwaretips > Mac Malware Removal Help & Support forum.
https://malwaretips.com/forums/mac-malware-removal-help-support.183/

Malwarebytes > Mac Malware Removal Help & Support
https://forums.malwarebytes.com/forum/165-mac-malware-removal-help-support/