File Open Issue with "loading master model and all reference"

I'm having an issue opening a file with OpenBridge Modeler. it is stuck when "loading master model and all references". The file that has been loading but didn't load succesfully is 

File: S:\CADD\PROGRAMS\Bentley\CONNECT\Organization-Civil\TXDOT\Dgnlib\Feature Definitions\S:\CADD\PROGRAMS\Bentley\CONNECT\Organization-Civil\TXDOT\Dgnlib\Feature Definitions

Model: Default-3D

I took a screenshot below. Did anyone know what I can do? Thanks a lot!