Hi Yang Shiting,

The reason for your errors could be possible reason,

You don’t have the attribute.

You have the wrong type of attributes.

Example – You create some enum attribute and then excluded the page from the project.

Later change the enum attribute to some Boolean/string any other type.

And now as you included it in your project, its not picking up.

So check the type and attribute availability of the in the entity (idea).

Hope it helps!

Regards,

Uday!

Hi Yang,

The grey color of the elements, represents, that they are excluded from your project, 

And you cannot access them, without including them in your project again.

You can right-click on them and click on ‘Include in the project’ .

Let me know, if you have any issues,

Hope it helps!!

Do you know how to deal with these new problems? thank you

Some other pictures, like this one, thank you very much for your patience and wish you all the best