According to the PHD2 debug log there were 4 attempts to start guiding before 23:15. The first three returned the error
"all equipment must be connected first"
Earlier in the log (22:39:35.013) there was a request from SGP to disconnect equipment, so that is why the equipment was not connected.
The fourth failed attempt to start guiding (23:13:29.615) says:
"failed to find a suitable guide star"
The log shows that for that camera frame you got a nearly fully saturated image (min ADU=229 max=255). The frame was saved to your PHD2 log folder, PHD2_AutoSelectFail_2016-06-01_231336.fit so you can inspect it if you want.
Andy