You cannot have it all ;-)
Set the debug from SWD to GPIO (no debugging) and your SPI will get routed.
Or use the UDB version of the SPI component.
My complete CYBLE-014008-00 application should consist of:
-2 SPI slaves (CYBLE-014008-00 is master)
-3 capsense buttons
Is it even possible with CYBLE-014008-00?
As I said before: you cannot have it all. The final project doesn't need debugging capabilities, so you should concentrate on integrating all hardware requirements to that few pins. try for yourself. SPI and debugging does not go together. You could use for SPI development and debugging a larger BLE chip and then use the developed solution in your module.