Since last week, I am unable to login to the v.13 sandbox.
Could someone please reset my password? My user ID is mbrunak
That is supposed to be handled through the administration only in order to keep track of the granted access.
Your id is still there and it is active.
Try contacting the admin
I am also facing this issue, where i am not able to login to sandbox.
my usesname is :-mansriva.
Contact the admin.
There have been some changes and you should have got a notification email about them.