I had both Photoshop CS6 and CC on my computer. I deactivated CS6 and uninstalled it. After that I tried to open CC which asked for sign in, but when attempted it gave error message no internet access (Access was fine) or wrong clock which was also fine. Need help solving this problem.
Please rename the hosts file to hosts.old. Below is the location of the file.
For Windows: C:\Windows\System32\drivers\etc
For Mac: Open the finder window click on go and choose go to folder and type /etc and press enter from there locate hosts file and rename it to hosts.old
For more information refer to the below article.