(and reluctantly) updated to the Overwolf FTB App from the legacy launcher due to.

I have searched the issue tracker and did not find an issue describing my bug. Head to your Minecraft Feed the Beast Launcher and access your modpack.

I don't know the legality of this, but could someone inform me the CreeperHost link where these modpacks are stored in the official legacy FTB launcher? Thanks either way. The only way to download these modpacks as of now is from CurseForge and, well, that speaks for itself (even though it's still possible to install from the zip in the CF page, I don't know if that will last for very long). Sidenote: unfortunately, after upgrading my account to a Microsoft account, I've lost all access to the legacy FTB launcher. The legacy FTB launcher is known for using the old MultiMC folder layout (instMods was still a thing back then).

After clicking OK, the pack will be 'installed'.

Version selected: either 1 or 2, as described above.

Note: FTB Retro SSP (1.2.5) downloads and installs perfectly fine. Version 2 installs, but none of the mods/config files are downloaded, it seems. Version 1 straight up fails, giving me the following warning: No installation method found!. FTB makes some of the highest quality modpacks in the Minecraft Modded community, we have a wide selection of modpacks that cover all bases, from basic Vanilla Plus and Kitchen sinks all the way to amazing adventure and challenge packs. There are two versions available: 1 and 2.

I attempted to install the FTB Legacy modpack 'FTB Retro SMP (1.2.5)'.

Minecraft ftb legacy launcher