@lucavenir , sorry to not be able to help but I think there’s an outside chance 
that this is some sort of regression or compatibility issue with ElixirLS.
I’ve been happily using Elixir in vsCode since circa 2015 and it stopped working maybe a week ago. I’m at the exact same place you are right now—your post above—but only part-time devving and don’t have the bandwidth to debug further at the moment.
On a Mac M1, for what it’s worth:
erlang 26.2.5
elixir 1.16.2-otp-26
Apologies for not being more helpful the moment. Just wanted you to know you’re not the only one. Anyone here have further ideas?
