Hi,
This is most probably caused by the missing navigation link 'BP':
1. execute T-code bsp_wd_cmpwb to display your component ZSLA
2. go to 'runtime repository editor'.
3. go to 'ComponentUsages', expand the 'ComponentUsage CUBTOrder'->'InterfaceView mainWindow', check if navigatoin link BP is there.
There are two SAP KBAs, they are not exactly the same issue, but they are very similiar as yours. Please read them. Hope they can help.
2041965 and 1921216
Best Regards, Corrine