[what does it mean when it say's '' the inventory system is currently unavailable'']

Hi i trying to log in to sl but this keeps coming up what does it mean when it say's '' the inventory system is currently unavailable'' but yet i can log in my alts  is this a sl thing?

[how long does it take from selling LS to get rl money? in the UK]

i sold LS to night and just wanting to know how long it takes to go in to rl.. im in the uk  love it  if anyone could tell me