Error while creating package using web app compiler

Failed to evaluate OpenFcn: Error: Illegal use of reserved keyword "elseif".

Failed to evaluate OpenFcn: Error: Illegal use of reserved keyword "elseif".

Failed to evaluate OpenFcn: Error: Illegal use of reserved keyword "elseif".

Error using Simulink.BlockDiagram.buildRapidAcceleratorTarget

Cannot attach a configuration set to a library.

Error in buildRacTarget

Error in buildRacTarget - Show complete stack trace

Displaying stack trace:

Error using Simulink.BlockDiagram.buildRapidAcceleratorTarget

• In Simulink.BlockDiagram.buildRapidAcceleratorTarget

• In buildRacTarget

• In buildRacTarget

Question: Can someone help in finding the root cause ?