Nice, and I found out how to fix up the game on the website itself.
1: Right click the game and find the button saying "Reload frame"
2: Go to the error trying to reference "vue@next" (line should say "<script src=...vue@next></script>") [website name not mentioned just incase]
3: Select "@next" and override the contents. Create a folder anywhere you want, and save that override to the folder
4: "index.html" should have opened with a purple dot, so go ahead and remove "@next" from the script
5: Save the index.html since it wont try reading it until it's saved, I think.
6: If it hasn't fixed yet, yet again right click the game and click "Reload frame"
Should be fixed for the website version, and the developers, if they ever fix this real quick, can have it patched in like 30 seconds. If this order doesn't work, then I probably didn't say something right due to me managing to struggle on finding a solution for a while.
P.S. "Incremental Game Jam Game" will read this save properly even with the fix.