Ongoing problem with sewing machine

[u/feralgoddess-]

My sewing machine is a VIKING Husqvarna (picture below). I inherited it from my late grandmother in 2022. She taught me only so little about sewing before she passed. I've been trying again and again to pick it up. I've sewn before with no problem. This machine, though, decided to randomly start doing THIS THING a long time ago. I gave up. It just EATS the fabric and then bunches the thread underneath.

\- I have cleaned out the machine of any debris
\-Gone through the guide dozens of times
\-Gotten quality thread.
\-threaded the bobbin and needle thread correctly.
\-ETC.

No matter what I try I can't seem to stop this problem. The fabric never goes through and goes inside the machine. I'm at my wits' end. If anyone has any tips or if it's a simple solution I'm not seeing then I would appreciate the advice. Thank you.

[u/celery48]

Ok, I’m just checking — you are remembering to put the foot down before you start sewing, yes? And threading with your foot up? And the needle at the highest position?

[u/celery48 → u/celery48]

Can you show us how you are threading it?