@pre , i checked with Edge without Incognito, samething happens.. I click in ellipsis (...) and nothing appears...
@ScottDurow , with the URL with /settings/features i enter in a blank page. I tried with only /settings at the end: I can enter on settings, but none of the links work.. If I click on Features link, I'm redirected to https://undefined/tools/systemsettings/dialogs/systemsettings.aspx and it's an error page.
I don't know if i got the correct GUID of my enviorment, where can i find this? I clicked in the name of the enviorment, and got redirected to this link https://admin.powerplatform.microsoft.com/environments/environment/Default-ef095885-95ff-4250-89cb-134e2a78f80b/hub?geo=Sam i supose my GUID is the red bold text.

Some more informations:
-> i'm using a Microsoft 365 E5 developer subscription (85 of 90 days left)
-> i can't delete the actual enviorment, if you see in the first print screen, normally when you select an environment, appears some buttons at the top of the page with option to delete, edit.. In my case, any buttons appears.
-> i can't create another environment, when i try to create a enviorment with Trial type this message appears: "This environment can't be created either because the tenant lacks an active trial subscription or the limit of trial environments has been reached. Request ID: 12e18b16-b7b1-4a31-9a8d-9de43165ad7c."