[Der Zugriff auf die feste IP-Adresse 149.154.167.41 wurde durch die Filter für Internetseiten verhindert.]
This message was linked to: fritz.box/help/help.lua?sid=07d7222cfc17e8fc&helppage=hilfe_syslog_800.html
So, I went to the filter settings: fritz.box/?sid=07d7222cfc17e8fc&lp=trafapp
to “allowed IP addresses”
and deleted all IP entries.
Yes, very weird as the IP blocked is part of the telegram network. I’d expect it to possibly block telegram app but not the entire connection to your wifi network…