I found that CWMS 2.7.1.1073.B-AE is not compatible with CUCM 11.5.1.16900-16 from the below guide:https://www.cisco.com/c/en/us/td/docs/collaboration/CWMS/2_7/Planning_Guide/cwms_b_cwms-planning-system-requirements-2-7/cwms_b_cwms-planning-system-re...