Thanks for the reply @Divyashreem, I solved the issue. Apparently orchestrator tends to download and use the activity packages as mentioned in the project.jason . If the version is less than the one already downloaded and kept in orchestrator activity directory it won’t download the new package.
The new package in orchestrator directory wasn’t compatible with the older version mentioned in the project.jason .
I rollbacked my version of activity to last successful ran version and copy pasted the same package in orchestrator directory’s activities folder ,and it worked 