Problems over night (france-time) with rocket.chat at chat4free.de

Hello out France!

www.erotikchat4free.de and chat4free.de

have rocket.chat.

I can use it with TorBrowser over the day but in the night (france-time) connections error only. UTC problem?

TorBrowser: 6.5.1 (based on Mozilla Firefox 45.8.0) / Windows 7 amd64

Trac:
Username: Botanikerin