What is an online editor and how to restore its work?

Question

WYSIWYG

Good afternoon!
Tell me, there is a code editor in the site admin panel, similar to the one in which I am now writing this text, here is a screen: joxi.ru/12M6PloT4pznVA.jpg
After changing the hosting (hosting remained the same, it was transferred to another account), it stopped working and writing now you only need in the html code
joxi.ru/8AnqROnCqYJwe2.jpg
What is the correct name of this code editor, and which way to look in order to restore its work?

Answer 1

... a transfer was made to another account... in which direction to look...

In the direction of the rights and owners of files / folders, as well as the presence of the correct paths in the cms configs.