From what I can see on the manufacturer's web site, it uses a bowden tube design, with a Push-to-connect fitting (PTC) to hold the bowden tube to the hot end. You push down on the colored plastic collar and push in on the bowden tube a bit, then pull up on the bowden tube.

You should then be able to unscrew the PTC fitting and have better access to the heat break and hot end.

If you can see the filament stub, heat up the nozzle, gently pull it out. If you can't see the filament stub, heat up the nozzle and push more filament in to clear it.

If the nozzle got too hot and carbonized the filament, you have a clog and a mess. Use The Google to research "3D printer nylon cleaning method" and consider to buy some nylon filament to clear the clog. There are variations of the nylon method that use PLA or ABS that you can also try.