How do i fix "There was a problem communicating with the license server. Would you like to manually activate?"

[Finn1744]

Every time I try to open unity 3D it always pops up with the message above and no matter what I do it does not go away. I have tried uninstalling it, re installing it and everything in between. Can someone please help me

[malekbakeer]

if you already bought unity3d pro you can put the licnse by pressing manual activate

and if u want unity3d free click on free trial