Odd forum bug

I tried to post in the forums, but the suddenly an image saying, this page isn't working, came up. Then when I tried to refresh, it said reconfirm form submission (see in link) and I pressed continue and then it refreshed with the message, cross origin request Forbidden. This has been happening to me for a while now. <a href="ibb.co/kVny7yf"><img src="i.ibb.co/cK5vBvH/Screenshot-20200724-170626-Chrome.jpg" alt="Screenshot-20200724-170626-Chrome" border="0"></a>
<a href="ibb.co/j3MFP8B"><img src="i.ibb.co/frp7zXB/Screenshot-20200724-170635-Chrome.jpg" alt="Screenshot-20200724-170635-Chrome" border="0"></a>
<a href="ibb.co/R2WPTzX"><img src="i.ibb.co/6Y5b0gK/Screenshot-20200724-170640-Chrome.jpg" alt="Screenshot-20200724-170640-Chrome" border="0"></a>

I suspect that it has something to do with the volume of your posting; I have heard that if you post too much over a short period of time, you get timed-out by the system.
Honestly, I'm kind of surprised you didn't encounter this earlier, considering that you somehow have almost 500 forum posts in your 2 weeks on lichess.

500 posts in 2 weeks! Have you spent all day posting on lichess forums.

After the posting in the million pages forum, I thought you would know: it’s an error caused my posting too much in a short period of time, 4 posts in like less than a minute, causes the White Screen of Death, you can posy again after 4 mins

I did 600 posts in 2 days once.

Well, with the pandemic, I suppose I've been on Lichess a bit too much. Playing and posting. I'll tell you what, if I reach 1000 before September, I will put myself into kid mode.

And I'll come out of Kid mode in November.

Two times my gameplay was already frozen.
Could not do anything. My opponent, at the second,
called a draw. Lucky me.

Here's the screenshots from the original post, by the way.

#1 :
#2:
#3: