Modpack loads as vanilla, even after changing forge file to modpack.jar

[ultranine]

I was trying to upload a modpack I made for 1.16.2 today, and thought I followed all the steps correctly. However, the game launched in vanilla. I did some research and found I was supposed to change the forge file to modpack.jar. Even after doing so, the modpack still launched in vanilla. I tried changing the dropbox file and updating multiple times, no change. Does anyone know how to fix this?

Modpack: https://www.technicpack.net/modpack/overflux-refined.1747313

Dropbox Link: https://www.dropbox.com/s/vnil6uo34abdfgq/refined0.2.zip?dl=1

[JaariAtmc]

Did you rename the forge installer? Because Forge 1.13+ requires you to use the installer. ONLY RENAME IT TO MODPACK.JAR.