How to deal with [NRF_ERROR_RESOURCES]

Hello
If "NRF_ERROR_RESOURCES" occurs, does the set transmission data not be transmitted? Will it be sent partway? I do not know either.
If "NRF_ERROR_RESOURCES" is returned when executing [ble_nus_data_send ()], can I freeze the time and execute [ble_nus_data_send ()] again?
Thanking you in advance