I have the latest version of the Lightroom CC running on Windows 8.1. I purchased an X-Rite ColorChecker (CH) Passport today and installed the software that came with it. Using my Nikon D7100, I took a raw picture of me holding the CH in my hand, and then imported it (.NEF file) into my LR library (selected the Copy option on the Import window). Then, I switched to the Develop region for the same imported pic. Afterwards, I clicked on the menu File->Export with Present->ColorChecker Passport to create a new profile. The LR never gave me the option to enter a Profile name, in other words, it never displayed the Enter DNG Profile Name dialog popup window. However, it did create a new custom profile named "profile"; I can see it under the Camera Calibration tab. I tried to do the same process again, and it says that would you like to override the "profile" present.
How can I get the Enter DNG Profile Name dialog popup to come up?
X-Rite hasn't updated the Lightroom Plugin since 2011 and it appears some users are having issues with Windows 8, 8.1, and 10. The below link is what I suggested to one user. The poster did not reply so I have no idea if it was ever resolved. It works fine on my Windows 7 system using LR 2015.1.1 so it's most likely a Windows compatibility issue.
One other thing you can try is to set the Passport.exe program file to run in Windows 7 Compatibility mode. Go to the below folder location and right-click on the Passport.exe file and select Properties. Go to the Compatibility tab and check 'Run this program in compatibility mode for and select 'Windows 7' in the drop-down box (see below).