From the stack trace you can see that you're trying to do something on an object that is not available:
"Caused by: n: An exception has occurred for the following request(s): fu (depth = 0): //PipsAndSubbies.MendixExtract at x.a(SourceFile:57) Caused by: java.lang.IllegalArgumentException: Entity id should be not zero"
Could it be that there is a difference in the data available for the client and locally?
The entity id is is an identifier for each entity (not the entity's instances!) that is kept in a separate table. If this entity is 0 it might mean your database is corrupt for that entity. This is a state that normally only happens if someone changes the database structure manually. Or it could be some obscure bug, but considering the same model runs fine on your own server I think this is probably not the case here.