Getting 'Unlock All Items' error in the Publishing Server Worker Log in FlexPLM

• Getting Unlock All Items error in the Publishing Server Worker Log
• Whenever the new image gets to publish the below error is getting captured in the Publishing Server Worker log 

ERROR FPLMDS.Worker.Document.DocumentProcessorBase - Document processing exception
FPLMDS.Worker.Document.DocumentTimeoutException: Unable to finish action 'Unlock All Items' in the given time.
at FPLMDS.Worker.Document.AIActions.RunAction(String actionName, String actionSet)
at FPLMDS.Worker.Document.DocumentContainer.Open()
at FPLMDS.Worker.Document.DocumentProcessor.ProcessDocument(String sourceFilePath)
at FPLMDS.Worker.Document.DocumentProcessor.DoWork_internal()
at FPLMDS.Worker.Document.DocumentProcessorBase.DoWork()

ERROR FPLMDS.Worker.Document.AIActions - Exception is occured in action runner. transmission_id=xxxxx-xxx-xxxx-xxxx-xxxxxxxxxx
System.Runtime.InteropServices.COMException (0x800706BE): The remote procedure call failed. (Exception from HRESULT: 0x800706BE)
at System.RuntimeType.ForwardCallToInvokeMember(String memberName, BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData& msgData)
at Illustrator._Application.DoScript(String Action, String From, Object Dialogs)
at FPLMDS.Worker.Document.AIActions.<>c__DisplayClass17_0.<RunAction>b__0()

ERROR FPLMDS.Worker.Document.DocumentProcessor - Unable to create COM interface for Illustrator Application
System.Runtime.InteropServices.COMException (0x800706BE): The remote procedure call failed. (Exception from HRESULT: 0x800706BE)
at System.RuntimeType.ForwardCallToInvokeMember(String memberName, BindingFlags flags, Object target, Int32[] aWrapperTypes, MessageData& msgData)
at Illustrator._Application.set_UserInteractionLevel(AiUserInteractionLevel value)
at FPLMDS.Worker.Document.DocumentProcessor.ProcessDocument(String sourceFilePath)

ERROR FPLMDS.Worker.Document.DocumentProcessorBase - Document processing exception
FPLMDS.Worker.Document.DocumentUserException: Can't create COM interface for Illustrator Application
at FPLMDS.Worker.Document.DocumentProcessor.ProcessDocument(String sourceFilePath)
at FPLMDS.Worker.Document.DocumentProcessor.DoWork_internal()
at FPLMDS.Worker.Document.DocumentProcessorBase.DoWork()