Would you be willing to send me your save? It might be troublesome to send, but I'm pretty sure if the game isn't running, there might be something about your save which is causing the issue
On Chrome (while at drillur.itch.io/lored), press F12, and then on the left go to IndexedDB > /userfs > FILE_DATA, then look for "/userfs/godot/app_userdata/LORED/something.lored".
However, from here I have no idea what's going on. It must be taking the save file and "optimizing" it somehow. I can't read what's going on with it. This is one of the MANY reasons I hate working with HTML games. Debugging is made needlessly obnoxious.
Try playing the game in incognito mode. It won't try to load a save. If the game still isn't running, it's some error on your end