In my case the solution appear triying via telnet to install the license (license Install "path to tftp IP & file") give me an error "UDI in license line dos not match with the local udi". So, is a license error install of new versions. I tried 7.6 install and upgraded with tftp fo solarwinds to versión 8.110 same results. Until telnet sessión all where clear. UDI is composed fron PID: AIR-CT2504-K9 + Serial number in my case the "-K9" was missing. Id you alter the file give an error of license file invalid. Waiting for my new license. Many days to this be clear. TAC CASE633477993 Waiting for my license!