Hello Aarti,
What are the error details? Can you check update item action and what fields are you updating, also check if you update correct format of data into the lists? If still these are of no use, can you share the workflow diagrams here?
Thanks Soni for your response.
I have checked the log and it was Time Out error.
I have identified the cause for it.
Issue was, removing all permission and adding "full control" permission to 3-4 groups due to which It was getting time out error.
I found the below steps and It worked fine.
"Don’t remove all permission , remove those which are actually needed and follow the same standard for permission as in parent site."
->Instead of removing all groups , I have only remove the group whose permission need to be changed.
-> add the group with the required permission.
and it worked fine.