Unable to login to PTCU- ThingWorks Composer -

Created a login to PTCU Composer 2 weeks back- for ThingWorks Course  Was able to login till last Friday - 

Now this is throwing back message as 'You have been successfully logged out' and not allowing to login after multiple attempts.

Username and password are all correct.

Same issue faced by multiple people from same Organisation.

Please look into this asap as the course need to be completed by 11 Nov 2019

Thanks
Vidya