Vray render getting stuck at Progressive Sampling

Hello, I’m pretty new to Rhino and rendering with V-Ray, and I’m hoping someone can help with a recurring problem I’m having.

When I go to render an scene the buffer bar is getting suck on Progressive Sampling, this has happened across multiple files.

I have a feeling that it may have something to do with having imported blocks that other people have authored, but this seems like something fairly common so I can’t really understand why this might impact.

If anyone is able to provide some insight, or point me in the direction of a previous answer I’d be extremely grateful!!!

Link to file is below should anyone have the time to take a look