When trying out the experimental Maya plugin it can't find the license. It gives me the Retry|Sign-in Out|Cancel option, and unlocking doesn't work. It works for the stable version and I've had this trouble with other experimental versions, but I've had 3.80 installed before (not 3.80.1).
Windows 10 64 bit
GTX 970
32GB ram
Nvidia Driver: 391.35
OctaneRender Standalone version: 3.08
OctaneRender plugin version: 3.08.1 - 12.46 RC2
Maya Student 2018.3