Why can't I log in to YouTube?

Something very strange happened to me. So I'm on the laptop and logged into my mobile phone on YouTube with my Google Account.

All well and good, I've heard about the laptop on the said platform music, suddenly the window is refreshing: you can see the YouTube homepage at once I was logged out… Then I click on sign up, or Log in and get this picture to see.

I can click on "login" as often as I want, but keep getting this window. I'm still logged in on the phone. Never had any problems with that.

I hope you can help me and thank you in advance.

Have a nice evening! ♥

Short Supplement: When I click on the link to fix the error, questions, what and why and how come. But no suitable solution…

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