I used every possible combination of the letters that correspond to the 4 symbols you see and nothing worked, very stuck also. Not sure if I'm missing something.
Well then there is probably an issue that prevents the code from being accepted. Honestly it's not a very complicated password to find, so I'm sure you already tried the good one. It's a shame, I tested it several times during the Jam and it always worked well for me. I will try to post an update to fix it after the end of the voting period. Thanks for playing it!