White page trying to add a post in wordpress

Hosting Support
1

Hi, I have a website made by wordpress with this user: epiz_25030451
When I try to add a new post (clicking the “add post” link), I obtain a totally white page.
Could you help me, please?

2

Try to install the plugin “Classic Editor” from the WordPress dashboard and see if it fixes the issue?

3

Perfect, it worked.
There will be the possibility to have back the other interface?
thanks.

4

You could return to Gutenberg, but if it’s broken you need to fix it.

5

Hi, uninstalling that plugin it gives me a 502 Bad Gateway when I try to create a new post.
What’s the way to fix the problem?