If it is consistent and you can create small project exposing the problem (by your picture it looks like error happens in VMG, can you delete VTS1&2 ?) we will be glad to look at it.
I notice you have the 'Skip Blank Frames' option icon turned on in your screenshot. Try turning that off, and then opening the DVD. I've been having intermittent crash problems with various DVDs as soon as I click on an item in the tree and DVDRM tries to find a preview frame (doesn't matter what VTS.) Turning off the 'Skip to non blank frames in the Domain Content Pane preview' seems to have remedied the crashing problem for me.