I was also getting the two incessant pop-ups referenced here. A bit of research was performed and I quickly discovered these are files associated with the Citrix Receiver. These files have been on my Mac since 2015 (it's 2020 and we are going through the whole COVID-19 pandemic). These popups started after I upgraded my Mac OS to 10.15.3 and then performed a Malwarebytes update and then performed a malware scan. Malwarebytes itself does not see these files as malware.
To eliminate the two messages, I clicked the "Show in Finder" button on the alerts and then moved the files in question to trash. The files were located in the libexec folder.
So that others can find this error via a Google search, here is the content of the messages:
"ServiceRecords.app" will damage your computer.
This file was downloaded on an unknown date.
Report malware to Apple to protect other users
"ReceiverHelper.app" will damage your computer.
This file was downloaded on an unknown date.
Report malware to Apple to protect other users