Hide my online status don't works

This error has been told to me by an alliance friend from another world and I have asked him to take some screenshots and explain it to me in detail to translate it as correctly as possible.

World: Tiberian 40
Game version: 20.1

Due to a player who hid his status, he also wanted to hide his, and even though he got an error message, when reloading the game it appeared as "hidden".

He did not capture the error message because he did not think it was important.

When the player who caused the problems left the alliance, he tried to change his status so that it did not appear as "hidden". At that moment, another error message appeared very similar to the one he gave him when he activated the hidden state. https://prnt.sc/stynoo - https://prnt.sc/styqjy

The error plays continuously every time he try to change the state.
Sometimes the hidden status box appears as activated and other times it does not appear as activated but the status in the game remains "hidden".

He have tried checking the hidden status box and reloading the game several times but his "hidden" status has not changed. https://prnt.sc/styspz