Other than loose wires or a faulty board some things are these.

Did you do a firmware update on the printer from the flashprint software? Mine told me to do that when installing.

Are you printing from USB? If so turn off power saving for the ports. Also if you are on a USB 3 port give a USB 2 a try.

Maybe up the extruder temp a bit to 230 and make sure there are no pinch spots in the travel path for the filament. Also make sure the filament hasn't gotten crossed on its self on the reel, like the end got under a few loops and is crossed over itself and starts to tighten as it feeds.
What software are you using>