Hey @kbhargav5, sorry for taking this long to answer. The Defender team is monitoring everything in the Defender category of the forum, so I'm moving it there.
The execution reverted is related to this question (the details are there):
Regarding the invalid signature length, I'd ask you for the contract code or a minimal reproducible script so I can take a look. The contract is not verified so I don't know what's happening under the hood