A friend told me last week that he was unable to leave anonymous comments which are allowed on my blog and worked before... so we have a problem.
Obviously the first thing I did was contacting the Blogger help desk... surprise they didn't gave a fuck judging from the absence of reply.
So I did what I should have done from the start... running tests.
This is the results:
Works fine with Chrome
Works fine with Firefox
Doesn't work with Edge (you shouldn't use this browser anyway)
No idea for Opera, Brave or Internet Explorer (time to upgrade if you use that one) since I don't have them
If you use a smart phone I can't help you since I don't own one.
Hope that will help if you encounter the problem...