XF 2.2 Can't post tutorials without that error

[Roiarthur]

Hi, i have a problem that i cannot solve on my website

Tutoriaux Excalibur

Tutoriaux-Excalibur est un forum informatique présentant des tutoriaux, des tutoriels, trucs et astuces informatique

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I have Xenforo v2.2.13 with Shade Of Grey style install

Since a couple of hours i cannot post any tutorials, i am having that problem

This is the tutorial that i try to post

This is the error that appears

I can post a regular post with few words but when i try to post a tutorial that error appears.

I did a restauration of my database but the problem is still there

Do you have a solution to my problem ?

I try 2 different browser Firefox and Edge the problem is the same

 

[Paul B]

What is a tutorial?
Is it from a third party add-on?

The browser console (F12) will provide details on the error.

 

[Roiarthur]

Andy solved my problem, it was a server protection at the Planet Hoster host that was the cause, it was removed, I could not write Search Engine Optimizayion (SEO) the protection prohibited it.