Error after upgrading to version 15.0.1

I apologize for my ignorance, I am just getting involved in an AWX in our environment. Currently after upgrading to version 15.0.1, we are getting the following error at login prompt:

ERROR

Failed to read /api. GET status: -1

I’ve tried google, but am unable to find any assistance out there and hoping someone from the boards can assist.

Thanks,
Russell