So you have MOD A, but you now want it to run on a custom FSO build, so you add the custom FSO build dependency to MOD A, then update the metadata (or add a new version to the mod). When clients download the update this custom FSO build mod is not installed. What results in a "missing fso build for this mod".
This is fixing by manually installing the mod.
IF the client did not had the mod previusly installed, (making a clean install) this does no happens, the dependency FSO build mod is installed properly.
So you have MOD A, but you now want it to run on a custom FSO build, so you add the custom FSO build dependency to MOD A, then update the metadata (or add a new version to the mod). When clients download the update this custom FSO build mod is not installed. What results in a "missing fso build for this mod".
This is fixing by manually installing the mod.
IF the client did not had the mod previusly installed, (making a clean install) this does no happens, the dependency FSO build mod is installed properly.