According to the NASA blog, the CYGNSS launch that was planned for today, Wednesday, December 14th, is being delayed due to an issue with flight parameter data used by spacecraft software.
This issue was discovered during routine testing Tuesday. The new flight parameter data have undergone verification testing on the engineering model and will be uploaded to the spacecraft on Wednesday. The uploading of new flight data is a routine procedure and is expected correct the issue.
The next launch attempt will be determined pending the results of ongoing tests.