It would be much better if you could add share by WhatsApp in the options.
Thanks & Regards.

Did you try "Enhancer for YuoTube" addon..?

I didn't fix the problem, but I found a way to run it.
You can install one of "Opera Plugins" such as "Black Menu for Google" or another similar, then click on it and select any of the icons displayed there, including "Google Keep".
Good luck.

@burnout426
It´s working for me now, thanks.
Just that it's doesn't work for Sidebar yet.

Good extension, but it doesn't work from latest Opera version...