Windows NT 10.0, Chrome

I added this item to my list

"
300;200;0;0;0;0;*;0.8;*;12-Sided;Glitch;*;;;;;1]Orb]Apeirogon];0;Dodecahedron;067;*;-5;15;0;000;1;00;*;*;*;*;*;067;
"

After saving, this list will no longer open. I opened a backup that doesn't even have this item and it still won't open! I tried resetting, clearing temporary files, logging out, disabling all extensions, but I still can't open it! I couldn't open the project in an offline editor to try there since the client doesn't work on my computer for some reason. Other lists open fine, and I can still create other lists. Please help!! I had a lot of data in this list!