Based on your errors here when your script is trying to add wrapped routes or ECMP routes, but it can't find the "parent" route element this is why it appears to be failing due to the differences in route output format between IOS and NX. You can fix...

@abhishekkumarrakeshkumarmishra Sometime thing can take longer than anticipated. Would suggest to check back in a few hours.

I am not sure whom owns this tool now, @yangorelik do you know here please?

@alessiagreco did you not post this already here? https://community.cisco.com/t5/devnet-general-discussions/how-can-use-forloop-in-nso-rfs-template/m-p/5104183 It feel like this is a fake account.....

That seems odd, did your sandbox set up without errors? I would end the reservation and start a new one, that normally resolves most issues.