Protocollo

Sorry, my description of the problem was terribly faulty ??
I meant: “Is it possible to have always the refresh button on the WP Admin bar when I’m logged as Admin but viewing the site (not the “backoffice”)? Or, if it’s not possible, is there a “function” link (for example https://www.mytestsite.com/wordpress/wp-admin/forcerefreshnow) so that I can launch the refreshing process from my browser menu bar (while I’m logged, of course)?
Thanks in advance!

Thanks. I cleared browsers (both Chrome and Firefox) cache but it doesn’t fix the problem. I can’t find where to clear “cache in cache plugin”: can you help, please?

Ops: I created… and chose.

Solved: I create an “API key” (first option, not “0Auth” nor “Service Account”) and choose “Server key”. It works!

Same problem :/
Tried to create key ( https://wpdocs.philderksen.com/google-calendar-events/getting-started/api-key-settings/ )
but I can’t see “Public API Access” option…