I have been using my Google Analytic Properties since 2016. (a couple of Google Sites and Google Sheets). This August all my Google Sheet properties have stopped stracing visitors' activity. Analytics says there is no traffic, but I can see there is a fairly big visitors activity (see screenshots attached).
https://docs.google.com/spreadsheets/d/1egM1io2HLLsppEdWwe2-gsmabZ-f942MChm1iWqYmHE/edit?usp=gmail
In my Sheets, since 2016, I have been using the GA Beacon code below: =image(getGABeacon("UA-57765892-4")&"?pixel"), - this is a white pixel in cell A59.
Inserted in the Sheets I have a script that worked fine for years.
In Analytics I set thd page below as a target to trace: https://ga-beacon.appspot.com/
The record of traffic in my Sheets has stopped on the 17th of August (I have no problem with my Google Sites, though).
I am not an expert, only a simple user, so I have no idea of what could went wrong.
Thank you in advance for your help. Joseph