Thank you so much for playing RETRYS, and for taking the time to report this. I’m really sorry that the error interrupted your playthrough, especially when you were enjoying the game.
I’ve been investigating the issue, but so far I haven’t found any problem with Map036.json itself.
At the moment, one possibility I’m considering is a temporary file-loading failure over HTTP/CDN in the browser version.
I’m sorry again for the trouble, and I really appreciate you letting me know.