Do you use Opera Sync? If so, are you encrypting your data with a custom passphrase? Do you user Opera's VPN? Are you blocking 3rd party cookies? Have you cleared all cookies for google.com? Have you tried disabling all your extensions? Are you using Opera's adblocker? If you download the Opera installer, launch it, click "options", set "install path" to a folder on your desktop, set "install for" to "standalone installation", uncheck any checkboxes, you want and install (do not enable sync or anything in it), how does that Opera behave (right now at least)?

Sure. As long as you mean Gmail in Opera and Photos in Opera, not one in Opera and the other in the appropriate app.

Moim zdaniem - https://prnt.sc/mq7nfq ładuje Ci się strona google ale jakaś "uszkodzona". Szkoda, że na obrazku nie widać całości - szczególnie paska adresu.

Did you update your computer location info? Did you give Google Maps access to your location?

To have it disappear (a workaround): right click on the window and "reload frame".

For this to happen, both Opera and Ecosia need to want it, and it has to be profitable for both. So did you already contacted Ecosia? What they say about it? Di dthey already try an agreement with Opera?