What's the meaning of ASTRA_STATUS_TIMEOUT?

Hi orbbec friends.These days I always met a error which named “ASTRA_STATUS_TIMEOUT” when I run the BodyReaderPoll sample.I cannot find any clues.Could you please give me any information about this error?And any reply would be sincerely appreciated!
PS:
My camera is Astra_pro
My os is Ubuntu 18.04