[Solved] WP Mail Issue: Unable to Open Options, Display Messages, Mark Colors & New Mail in Link (Photos)

Hello, I have a strange problem with mail on wp, I have a few boxes there but only on one today I noticed strange changes.
I can not open the option as before, the messages are in one column and not 10 per page, I can not mark the color of the message, and the new mail is written in the link.
Especially today I created a new account and everything on it is like in the past, despite the fact that it was created today, how is the old account written in a miracle written in a new post since I did not change anything ?.
I would like to ask for help, add photos to make it easier for you to see the changes I am about.

1 An account created today and other mailboxes that I have.

2 Changes not explained.

3 Thus, after opening, the "OPTIONS" tab appears on the changed box.

This is the new look of the WP mail. Over time, all our accounts will look like this.
Last year, probably in the middle of the year, I wrote to help the Polish Army in this matter and that's the answer I received. What's worse, in addition to the unwanted change in appearance, the mail works slower than before (I have two accounts on the WP, one in the old - works fast, the other with a changed appearance and works slower).

zbychok14 I also wrote to technical support, I will put here what they wrote to me, if they answer.

QS300 You are right, the mail works much slower, in addition, all the "letters" are merging with each other because I have 50 of them on the site.
I have a total of 4 boxes and it is known that only on this most important they introduced me changes.

Another unnecessary and only hindering the functioning of mail changes and that's all.