Hi again, I think I found the reason.
I opened another browser window and it does let me delete.
The problem is part of another problem / issue.
Yesterday while I was testing, in the “Set default Location” option I tried to enter into the city field a Subregion that include many cities (as it appears in Google Maps). The problem of this is that when I tried to then enter a New address place that it outside this city / subregion and click the button “Set address on map”, a javascript pop up appears saying something like:
Message from the page https://www.mypage.com:
Please choose any address of the (my city name) city only.
Although I click the “Accept” button, this pop up shows eaxctly 8 times once and again, so Google Chrome let me select “avoid this page to create additional pop ups” and it seems I was asleep and clicked that option, si when I was trying to click “delete permanently” the javascript pop up to confirm does not appear.
Is this behaviour OK? I was also trying to select a subregion that includes many local towns but it seems it’s not possible because Google maps seems to detect the city only as part of the direction and not the subregion (maybe with an add-on).
Many thanks!