A couple of hours ago I was in the game, playing normally. Quit to eat and rest, and now it won't get back on. Boot version check error, exactly the same described in the title:
Unable to complete version check.
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Tried pretty much everything that Durian has tried except for the reinstall (which doesn't seem to fix it).

There are no maintenances or known issues at the moment on the servers (or at least there are no notices of it on lodestone/twitter/facebook).

I don't want to believe my weekend is done a day earlier.