FMIKit 2.9: FMIKit.setSFunctionParameters(gcb) as callback does not work

[VickieZ49]

In my simulink model there is a subsystem, which is from a custom defined library, it contains a block to import FMU. In the block properties's dialog, call back functions "LoadFcn" is used with following code:
FMIKit.setSFunctionParameters(gcb)

When I execute CTRL-D, this command can not execute correctly sometimes. The error says: Changing property "SimUserIncludeDirs" is not allowed.

If the model is in a main branch, it works. But if I create a new branch from the main branch, then it throws the above error.

Is there some limits or constraints to use it as a callback function? What is the reason of it and how can I resolve this problem?

Thank you for support!