We just recognized that Propilkki 2 server (our own server that shares IP addresses) is blocked by Russian government (or some communication thing there, ФЕДЕРАЛЬНАЯ СЛУЖБА ПО НАДЗОРУ В СФЕРЕ СВЯЗИ,
ИНФОРМАЦИОННЫХ ТЕХНОЛОГИЙ И МАССОВЫХ КОММУНИКАЦИЙ) for reason not known.
We try to contact them and find the reason for that blocking.
https://meduza.io/en/news/2018/04/18/russia-blocks-tens-of-thousands-of-ip-addresses-owned-by-the-cloud-infrastructure-provider-digitalocean
This is the reason, why this problem occurs.
We are working on this, but it requires a lot of extra work..
Wow... thats sad, if so :-o
I hope that this issue is solved soon (if not already)