Hey Braska! Some users may experience this as I have turned the experimental SharedArrayBuffer option on itch.io
I believe this error shows up when the browser doesn't support this option!
Would you mind letting me know if using a different browser solves the issue?? Also, could you let me know which browser did you use? I'd like to confirm the issue!
Otherwise, if you're still interested in playing you can download one of the native versions!