The problem was with the server, here the message:
Translation by Bing TranslatorDelayed availability of network interference
currently it comes because of redirects a cable to a network node in the data center to a negative impact of accessibility.
Specifically may occur from time to time to packet loss - i.e., that requests are canceled or does not properly handle. We assume that this disorder soon is fully resolved.
I made a backup of the database even shortly before the server problem...