BjerrisJR

Over some time now, i have been trying to download an add-on(LifeSteal SMP Plugin) Everytime i have tried, it just comes with a notification op in the top of the screen saying: Unknown error. I dont know what to do and it won't let me install. It says its compatible with the version of minecraft i am using (1.19.4) Please help me fix this, so i can once again have fun with my friends on minehut.