Not exactly sure were to post this as it's related more to the Technic website rather than the lanucher. But I had two modpacks that were for convince for me, the players on my servers, and anyone else. Yet they seem to be deleted as they are showing a 404. Why were they deleted.?
https://www.technicpack.net/modpack/purely-optifine-1152.1629630
https://www.technicpack.net/modpack/purely-optifine-1144.1535677