Hi,
I had my hosting provider WPEngine look in to this as well an they came up with this:
"When you visit … apache is throwing a segmentation fault. Segmentation faults are generally thrown when memory is handled improperly. I enabled core dumps in apache which will try to create a file that can be used to debug the segmentation fault when it occurs, but after loading the page around 100 times not a single core dump was generated (not all seg faults generate a core dump).
At this point I suggest reaching out to the plugin developer and explaining to them what you're doing, and that it's causing a segmentation fault."
Cheers,
Thomas