Some SID's are considered Radar Vector SIDs. This means that the SID has no specific route information, but is predicated on ATC Radar Vectors. SIDs that are Radar Vector SIDs are not able to be filed through ForeFlight and are also not accepted by Leidos.
It is best to just file your intended route without such a SID and you will typically get vectors to your first fix if the fix is listed on the SID.
Below are some error messages you might see if you try to file a Radar Vector SID:
"unable to file due to the departure procedure."
"Invalid Route. [SID Name]"