Common Issues and How To Fix Them (Troubleshooting)

After booting Smash, the game infinitely loads.

Most likely the update server is down. When this happens, ARCropolis waits a long time for an update to come that never does. There are two solutions to this.

1. Disconnect from your switch's internet connection or enable Airplane Mode.
2. Navigate to /atmosphere/contents/01006A800016E000/romfs and edit arcropolis.toml using notepad or your favorite text editor. Set the server IP to "0.0.0.0" An example is provided below.

Please see the configuration page for more details.

I've installed a mod, but it doesn't show up in-game.

Most likely your filepath for your mod isn't correct. Your filepath MUST match the path exactly to the data.arc. You cannot put a folder with a mod name into another folder with a name that does not match the arc filepath.
Example file path: /ultimate/mods/foldernameofmysmashmod/ui/message/msg_melee.msbt

I'm experiencing slowness/freezes in-game.

It's likely your SD card is formatted to exFAT instead of FAT32. exFAT is known to cause issues/file corruption.

After installing a skin mod, my skin (or other alts) are messed up/Invisible

This is because normally, Smash has files that are shared between slots. By modifying files on one alt, all alts that share that file would be replaced. This can be resolved by installing recolors of that skin that are over all slots or updating to ARCropolis Version 2.0.0 or higher, which fixes this issue.

After installing tons of mods I can't boot smash/get freezes/have general instability.

If you've tried everything else on this list, it's likely one of your mods is having issues. You may need to disable all your mods and enable them one by one to determine which one is causing issues. This can be done easily by using the built-in mod manager.