Solved

... cant open league again ...

Was hast du versucht zu tun?
... remove password to open league ...

Was ist stattdessen passiert?
... as soon as i open maintenance league ...the password restored and the league was closed

Passierte das Problem, während du W-Lan, Mobile Daten oder beides genutzt hast?
Wi-fi

Ist dieser Fehler in der App, auf dem PC oder bei beidem aufgetreten?
PC

Welches Betriebssystem ist auf deinem PC?
...windows 10 ...

In welchem Browser ist der Fehler aufgetreten?
... google chrome ...

Kann der Fehler wiederholt werden?
... maybe by not maintenace the ... we is supposed to be the main purpose of a promoter ...

Zusätzlicher Kommentar:
... Dear gentlemen ...

... i dearly hope you help us keeping on our league alive by beeing an open league which is only locked at certain days or moments ...

... hello ovih ...

... it seems that this is problem is gone now ... Thank you very much and all others involved for solving this problem so quickly ...!!!... 

... have fun ...