Deleurapps,
Looks like they forgot to encode some of the calls and I believe the + sign might be your problem, here is a note from Mohamed that solved it for me.
It seems that there are some calls that missed it.
I will ask the team to update it ASAP.
But in the mean time, you can update the cloud.lua file:
Line : 339
From: pathParams = “login=” … params.email … “&password=” … params.password
To: pathParams = “login=” … _urlencode( params.email ) … “&password=” …params.password
Let me know if this works.