The game developer answered my private message about losing all my progress, and today I reloaded the page (ctrl+f5), quit to the main map and I was presented to this option: "we've detected that your server save progress differs from your local profile. Which one do you want to load? override local server". This fixed my issue, thank you.
Hello, same problem here. All my progress has been lost. I was level 40. I sent a private message to the game developer, hopefully they will fix this soon.