Have you dropped the fob recently
gently shake the fob next to your ear and listen for a rattle. Sometimes the glue on the transponder chip comes loose and the transponder rattles around or gets stuck at the other end of the fob. That happened to me
i changed the starter and when that didn’t solve it, I ordered a new SKREEM/ring. That too did not correct it. Then I took the fob and listened for the rattle

For me, that was it.

I opened the fob and glued it down.
all good now

hope it’s just this for you too. It’s an easy fix