Dose Escalation Pan-FGFR (Fibroblast Growth Factor Receptor) Inhibitor (Rogaratinib)

Participants received Rogaratinib oral solution as a single dose on Cycle 1 Day 1 (C1D1) and twice daily (BID) from Cycle 1 Day 3 (C1D3) onward for the remaining 19 days of Cycle 1. For subsequent cycles, study drug was administered twice daily for 21 days each Cycle.

Participants received Rogaratinib oral tablet as a single dose on C1D1 and BID from C1D3 onward for the remaining 19 days of Cycle 1. For subsequent cycles, study drug was administered twice daily for 21 days each Cycle.

Participants received Rogaratinib 800 mg oral tablet as a single dose on C1D1 and BID (in total 1600 mg) from C1D3 onward for the remaining 19 days of Cycle 1. For subsequent cycles, study drug was administered twice daily for 21 days each Cycle.