NCT03711058 2025-09-16Study of PI3Kinase Inhibition (Copanlisib) and Anti-PD-1 Antibody Nivolumab in Relapsed/Refractory Solid Tumors With Expansions in Mismatch-repair Proficient (MSS) Colorectal CancerSidney Kimmel Comprehensive Cancer Center at Johns HopkinsPhase 1/2 Completed48 enrolled 16 charts