[bug] Server crashes because of the add-ons it automatically installed

[pixelsingrey]

When I try to install the Optimally Optimized server from the Instant category and launch it, it crashes with a log saying that the mods are incompatible with each other.

Steps to reproduce the behavior:

1. Go to 'Instant'
2. Click on 'Optimally Optimized'
3. Launch the server
4. See error

• I am not using Telepathy
• I am using GUI
• No settings were changed, downloaded from the website

OS: Win11 x64 Crash Log: ---- Minecraft Crash Report ---- // This report was generated by auto-mcs

Time: 7/31/25, 11:09 AM Description: Exception in server tick loop

[11:09:19] [main/ERROR]: Incompatible mods found! net.fabricmc.loader.impl.FormattedException: Some of your mods are incompatible with the game or each other! A potential solution has been determined, this may resolve your problem: - Replace mod 'Porting Lib Attributes' (porting_lib_attributes) 2.3.2+1.20.1 with any version that is compatible with: - minecraft 1.21.8 - Replace mod 'Forge Config API Port' (forgeconfigapiport) 8.0.0 with any version that is compatible with: - minecraft 1.21.8 More details: - Mod 'Forge Config API Port' (forgeconfigapiport) 8.0.0 requires version 1.20.1 of 'Minecraft' (minecraft), but only the wrong version is present: 1.21.8! - Mod 'Porting Lib Attributes' (porting_lib_attributes) 2.3.2+1.20.1 requires version 1.20.1 of 'Minecraft' (minecraft), but only the wrong version is present: 1.21.8! - Mod 'Player Animator' (player-animator) 1.0.2-rc1+1.20 requires any version between 1.20 (inclusive) and 1.21- (exclusive) of 'Minecraft' (minecraft), but only the wrong version is present: 1.21.8! - Mod 'Porting Lib Core' (porting_lib_core) 2.3.2+1.20.1 requires version 1.20.1 of 'Minecraft' (minecraft), but only the wrong version is present: 1.21.8! at net.fabricmc.loader.impl.FormattedException.ofLocalized(FormattedException.java:51) ~[fabric-loader-0.16.14.jar:?] at net.fabricmc.loader.impl.FabricLoaderImpl.load(FabricLoaderImpl.java:196) ~[fabric-loader-0.16.14.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.init(Knot.java:146) ~[fabric-loader-0.16.14.jar:?] at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:68) [fabric-loader-0.16.14.jar:?] at net.fabricmc.loader.impl.launch.knot.KnotServer.main(KnotServer.java:23) [fabric-loader-0.16.14.jar:?] at net.fabricmc.loader.impl.launch.server.FabricServerLauncher.main(FabricServerLauncher.java:69) [fabric-loader-0.16.14.jar:?] at net.fabricmc.installer.ServerLauncher.main(ServerLauncher.java:69) [server.jar:1.0.3]

Expected behavior: Expected the server to launch without any problems

[macarooni-man]

Hi @pixelsingrey ,

It certainly seems as though those mods are unsupported from the latest version of the game. I'll need to rewrite the template loader to accommodate the newest supported version of all the mods instead of the latest version of the modloader. In the meantime, you can specify the version of the server you want to install by clicking the gear icon on the right of the template to edit the settings. Otherwise, downgrading your existing server to the lower version will also downgrade the installed mods