Mod Name

Flashback

Mod Homepage

https://modrinth.com/mod/flashback/version/z0SX4zNw

Minecraft version

1.21.1

Describe the bug

When loading a fresh instance of a 1.21.1 Neoforge Connector pack, (i.e. only Connector and its dependency), alongside Flashback, the game crashes during loading.

Steps to reproduce

1. Open a fresh 1.21.1 Neoforge modpack
2. Install Connector & dependencies
3. Install Flashback
4. Start game
   ...

Logs

https://mclo.gs/9yCcPRI

Additional context

The compatibility tester said Flashback was compatible with Connector. (It was wrong.)