I'm planning to start a play through with friends on a server we're currently setting up and we noticed that a fresh install of Razi Protocol won't load without errors. Until 1.6.7 it was an option to downgrade some mods and make it work, but with 1.6.8 some changes in the dependencies removed that option.
So I went through the errors and tried to find fixes for them. For our server setup I then created this mod: https://mods.factorio.com/mod/rp-fixes to make it all work (we're also playing with all the optional mods listed in the RP info.json, not just the mandatory ones).
For our server, we're also installing RP via this mod that I created for my friends to have an easier time installing the correct versions of each included mod: https://mods.factorio.com/mod/oceanlabs-rp-modpack
It's basically defining RP as it's main dependency and then for each included mod it explicitly requires the exact version that we're using. This should ensure that we have a stable pack and don't run into issues in the future should one (or more) of the included mods release a new version with incompatible changes.