I've also noticed another problem where Wordpress tries to find a thumbnail for the mviewer but obviously can't resulting in a 500 error:
http://www.rafaeldejongh.com/wp-content/uploads/2016/07/westar-34.mview?thumb=1 Failed to load resource: the server responded with a status of 500 (Internal Server Error)
Is this something you can look into or is it my webhost causing a problem? Or has this to do with BPS again?
Thanks in advance for further information.