Run time error while upgrading mendix version from 7.21.15 to 8.18.19.
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Error : com.mendix.m2ee.api.AdminException: An error occurred while reading the Application Model at com.mendix.basis.impl.ProjectModelStoreLoaderImpl.initializeModelStore(ProjectModelStoreLoaderImpl.java:79) Caused by: java.lang.RuntimeException: An error occurred while reading the model file at C:\Users\THKAJA\Documents\Mendix\Chubb - Mendix Marine Cargo-main\deployment\model\model.mdp. Caused by: java.lang.RuntimeException: No new model classes have arrived within ten seconds, aborting model initialization(Class 'DomainModels$FloatAttributeType' could not be found).