Please, search on the forum for similar issues/questions before to ask the same twice
Regarding this error message, correspond to a Dolibarr native protection against potential attacks:
https://www.perplexity.ai/search/what-about-this-zDGCj66PRci9UzVpbsha3w
Last note: Be careful when copying and pasting from other applications like Microsoft Office or Google Docs, as the text may carry hidden characters or scripts. The recommended practice is to copy the text to a plain text editor like Notepad first, to remove any non-text elements, before pasting it into Dolibarr. This can help prevent the issue that is causing the error message.