I try do a QES sign and got this warnning:
You are currently calling outside our opening hours.
You can perform your identification at the following times. An appointment is not required.
Our opening hours:
Daily : 8:00 to 24:00
To continue with your identification at a later time, please copy the following link and try again during our opening hours.

I got the opening hours :
They are located in Europe, in Germany.
Their hours of operation are:
•DE & EN calls: 8am-midnight CET 7 days a week
•FR calls: 8am-9pm MON-SAT
•QES with wallet authentication is available 24/7 Peak hours: 9 - 11 and 14-18. Try to avoid those hours to get an agent.
please add timezone of the opening hours in this page. so the end user can convert to their timezon. Thanks.