Print is stopping mid print.

I have been trying to print the same part twice now. Mid print it just stops extruding plastic and the feeding part on the head gets jammed and I have to take it apart and pull the old filament out and clip the end and re install. What do youy thing is happening?

I was printing .1mm with 50% infill every 3 layers at .3mm
The infill seemed to be struggling even at the start. Should I possibly decrease my retract setting for this?

My setup is a SD3.
plexiglass case(unfinished) - the top piece is just sitting in the top with the filament going through the small space between the top of the Z axis guide rods protruding out the top of the case. I thought this was casing the jam but I have printed several other things with no issues.
40mm cooling fan with duct on the print head. - Could this possibly be causing my tip to clog enough to cause a jam?

I have attached the STL and a picture of where it stopped.