Having same issue - error code 108. Never had problems buying expansions. Support hasn't been helpful so far - suggested I try different browsers, which i did, and change security settings - which i also did. Waiting for updates..
Never happened to me except on a couple of occasions with, what I assume, to be trolls. Basically, I join an LFG titled "T4 All welcome" - and get immediately kicked with m loading screen to fractals still loading. This happened 3-4 times on EU.
you just ignore it and move on with your business around the map. The damage it does is laughable unless you keep hitting it giving it those juicy blocks.
I mean they've done it to FB as well and many other specs rendering them useless in sPvP. At least we can still play core engi in sPvp. ....Ohhh wait....