This is likely happening due to a licensing synchronization issue after the license upgrade.
Sign Out and Sign-in and then run the activation troubleshooter again.
Open Command Prompt as Admin and type the following commands:
dsregcmd /status
dsregcmd /leave
dsregcmd /join
If the above doesn't work, then try this:
Open Command Prompt as Admin and type the following and hit the Enter key:
cscript c:\windows\system32\slmgr.vbs /ato