That looks like a clog.

Try heating up the end, then removing the filament, then cut the filament flush and push it into the end, lower the temp a bit, and yank it out. Do that a few times to try and clear the clog. You can also heat the end, remove the nozzle, and clean it.

While it’s off, try pushing through some fresh filament by hand.

You were printing with wood, so it probably has wood particles stuck in it.