same problem for me, i tried making a simple line of code work on multiple different sites to see if it was site issue, also tried using different accounts doesn’t work either. also tried switching browsers and switching on VPN.
Wix code is simply not working on Editor Preview mode for the past couple of hours give or take, something must have changed on their side.
also worth noting that my published versions of my site work fine it is just the editor preview that is bugged