Hi, when using litematica 1.19.2 - 0.12.4 | malilib 0.13.0 on our server (1.19.2 paper) litematica outputs command with an extra slash causing errors. As you can see there are 3 slashes for we commands and 2 slash for non we commands.

[21:34:36 INFO]: _Zangetsu issued server command: //perf neighbors off
[21:34:36 INFO]: _Zangetsu issued server command: /gamerule sendCommandFeedback
[21:34:36 INFO]: _Zangetsu issued server command: ///pos1 -248,63,-272
[21:34:36 INFO]: _Zangetsu issued server command: ///pos2 -248,63,-267
[21:34:36 INFO]: _Zangetsu issued server command: ///set minecraft:water[level=1]
[21:34:36 INFO]: _Zangetsu issued server command: ///pos1 -248,64,-272
[21:34:36 INFO]: _Zangetsu issued server command: ///pos2 -248,64,-267
[21:34:36 INFO]: _Zangetsu issued server command: ///set minecraft:purpur_stairs[facing=west,half=bottom,shape=straight,waterlogged=true]
[21:34:36 INFO]: _Zangetsu issued server command: ///pos1 -248,65,-272
[21:34:36 INFO]: _Zangetsu issued server command: ///pos2 -248,65,-267
[21:34:36 INFO]: _Zangetsu issued server command: ///set minecraft:water[level=1]
[21:34:36 INFO]: _Zangetsu issued server command: ///pos1 -248,66,-272
[21:34:36 INFO]: _Zangetsu issued server command: ///pos2 -248,66,-267
[21:34:36 INFO]: _Zangetsu issued server command: ///set minecraft:purpur_stairs[facing=west,half=bottom,shape=straight,waterlogged=true]
[21:34:36 INFO]: _Zangetsu issued server command: ///pos1 -248,67,-272
[21:34:36 INFO]: _Zangetsu issued server command: ///pos2 -248,67,-267
[21:34:36 INFO]: _Zangetsu issued server command: ///set minecraft:water[level=1]
[21:34:36 INFO]: _Zangetsu issued server command: ///pos1 -248,68,-272
[21:34:36 INFO]: _Zangetsu issued server command: ///pos2 -248,68,-267
[21:34:36 INFO]: _Zangetsu issued server command: ///set minecraft:purpur_stairs[facing=west,half=bottom,shape=straight,waterlogged=true]
[21:34:36 INFO]: _Zangetsu issued server command: ///pos1 -248,69,-272
[21:34:36 INFO]: _Zangetsu issued server command: ///pos2 -248,69,-267
[21:34:36 INFO]: _Zangetsu issued server command: ///set minecraft:water[level=1]

This has already been fixed for the next release. There are is a "pre-release" of it here: https://masa.dy.fi/mcmods/client_mods/?mcver=1.19.2