heat it up, with one of those mini blowtorch things or just crank up the heat and wait, use some chopsticks or other safe materials to scrape it out.
that black ring should come out it's a collet. may be one like this. get some spares.
https://www.amazon.com/Genuine-E3D-Embedded-Bowden-M-BOWDEN-COLLET-METAL-175/dp/B07B69947W
undo the nozzle, heat it up, push it through.