Hello there users 
A few days ago we announced a big update and hence we requested you migrate all the projects from https://builder.niotron.com to https://beta.niotron.com.
For smooth migration of projects, we extended the deadline from 7 days to 23 days. Today we terminated the old builder instance. Henceforth all the projects of https://beta.niotron.com will be accessible from https://builder.niotron.com like it was used to be before. All the traffic of beta website will be redirected to the regular one.
Thanks
Team Niotron