Recently active topics in YouTube tagged with comment

In the past few days I've been trying to leave various comments but for some reason it will not work. I've write my comment and press the post button. The textbox and button becomes greyed out while the button says that it is posting. A second later it returns to the previous "Post Comment" text but everything is still greyed out and my comment is not posted. I can't even copy what I wrote in the textbox to attempt again



I've tried from twi different computers but the problem persists