Between Saturday, the 11th September 2021, and Sunday, 12th September 2021, I'll upgrade the Web/XMPP server from Debian Buster (10) to Debian Bullseye (11) as stated in the blog post below. Because this is a major upgrade, there will maybe be some unforeseen problems. So expect some longer downtimes on this weekend.
I can't say how long the downtimes will last but expect more than one.
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