oracle.apps.fnd.framework.OAException: Could not load application module 'oracle.apps.fnd.wf.worklist.server.NotificationsAM'.

In Production, all of a sudden users started getting: Could not load application module

In most jsp's users are getting the following error:
oracle.apps.fnd.framework.OAException: Could not load application module 'oracle.apps.fnd.wf.worklist.server.NotificationsAM'.

## Detail 0 ##
oracle.apps.fnd.framework.OAException: Application: FND, Message Name: FND_NO_TRANSACTION_ID.

The users can login ok and are able to navigate through forms as well.

Fix:

icx_transactions table needs to be cleared.

Please follow the below steps to schedule a concurrent request to purge the inactive sessions periodically (once in a week for high traffic instances):

1.  Login using sysadmin
2.  Navigate to Requests ---> Run
3.  In the Form that opens run/schedule "Purge Inactive Sessions" request.

A job should be scheduled to run this request at least weekly.

Ref: (Doc ID 1577877.1)