Authorization in WEB UI

Hello, Guru!

I want to create company wich generate lead. When i go to create Compaign (in role SAP_CRM_UIU_MKT_PROFESSIONAL) i see next error

Cannot display view MKTPRJ_COMMCHNL/OVEFChannels of UI Component MKTPRJ_COMMCHNL

An exception has occurred Exception Class CX_BSP_DLC_CONFIG_GENERAL_ERR - Error creating configuration model

Method: CL_BSP_DLC_VIEW_DESCRIPTOR=>LOAD_APPL_MODEL

Source Text Row: 27

When i add role Z_OBT i don't see this error and a see communication chanel.

How i can search authorization key which resolve this error?