After Zero Downtime Upgrade receive U00020568 Runtime error in UserInterface

Document ID : KB000088208
Last Modified Date : 14/04/2018
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Error Message :
U00020568 Runtime error in object 'XHOSTTREE(GET)', line '00029'. DS return code: '0000029136 UCUDB: "is neither a CLOB or BLOB field.'. Error occurred in UCDSFUN at position: 'DS_MEMSV2STRING'

After an upgrade using the Zero Downtime Upgrade (ZDU), the above error is displayed when the following conditions are met:
1) After a user logs in to a version 11.2 system using the 11.2.0 or 11.2.2 UserInterface.
2) When another user logs in to the system, the person already logged in recieves the error.
OS Version: N/A
Cause type:
Root Cause: Refresh of the activity list occasionally fails.
Update to a fix version listed below or a newer version if available.

Fix Status: Released

Fix Version(s):
Automation.Engine 12.0.0 - Available
Automation.Engine 11.2.3 - Available
Additional Information:
Workaround :