Printer head

Hi can anyone help me. We r having a hard time loading the filament. It was working fine for a long time and when we tried to load the filament today it seems like something is stuck. It won’t go all the way down to catch on to the part where it pushes the filament through and down to the nozzle. Not sure what to do it if something is stuck Help please

Have you sovled? if not, can i know which printer do you use?

Hi we have SV03. Thank you!!!

well, extruder of sv03 is same as that of sv01.
refer to the following video link.
tutorial to check and clean the nozzle and extruder

let me know if it not works for you.