RecruitingPhase 2Drug trialTo Assess the Efficacy, Safety, and Tolerability of INCB000928 in Participants With Fibrodysplasia Ossificans ProgressivaThis Phase 2, Randomized, Double-Blind, Placebo-Controlled Study is intended to evaluate the Efficacy, Safety, and Tolerability and PK of INCB000928 administered to participants with a clinical diagnosis of fibrodysplasia ossificans progressiva (FOP).