As the title says. Only seems to happen with the latest 2 builds of optifine (HD U I4 and HD U I3)
Version 1.13.24

Mods:
fabric-api-0.80.0+1.19.4
malilib-fabric-1.19.4-0.15.2
modmenu-6.2.2
optifabric-1.13.24
replaymod-1.19.4-2.6.12
tweakeroo-fabric-1.19.4-0.16.0
voicechat-fabric-1.19.4-2.4.5

So does mine, but I've only got
fabric-api-0.79.0+1.19.4
replaymod-1.19.4-2.6.12
Optifine_1.19.4_HD_U_I4

Mine did too, same load order as ImSpyWare.
Though I have come to find out it is Replay mod that is causing the issue. as my game works without that mod installed.
I hope this helps.

Load order: (that works.)
fabric-api-0.80.0+1.19.4
modmenu-6.2.2
Optifine_1.19.4_HD_U_I4
optifabric-1.13.24

Hello! I am having a similar issue. I have the same versions of OptiFabric and OptiFine installed as you, and when launching with the ReplayMod, my game crashes with error code 1. I talked to a dev from ReplayMod, and they said that OptiFine is too poorly written that it does not allow the mixin from ReplayMod to be applied. They said that it was also not worth their time or effort trying to fix it, but I hope that the devs of OptiFabric (or OptiFine) do something about it, but until then, the ReplayMod will be getting a bad rep from me.

So does mine, but I've only got fabric-api-0.79.0+1.19.4 replaymod-1.19.4-2.6.12 Optifine_1.19.4_HD_U_I4

Same, ive tried older version for optifine, same result, it crashes on start.