@Sakshi - How about the 'Use an existing Adaptive Form' option that is available under Adaptive Form Container properties? Would that not help achieve the use case for simple forms? Although, you might want to emphasize on the pros/cons involved and whether it is recommended.
Hi,I am afraid it could be failing with this message for multiple reasons. It would be helpful if you can share the error logs / exception trace. Also, which version of AEM are you using.Thanks,Anshika