Originally published at: http://blog.gamedev.tv/unity-wont-start-sorry-this-link-is-no-longer-valid/
How frustrating Unity isn’t starting and telling you “Sorry, this link is no longer valid”? Not a helpful error either!
This confused me the other day as unity had been working flawlessly previously. To make matters worse restarting the computer appeared to fix it, but just once and then it started again.
So what is going on here?
Well I had just installed Unity 2018 beta, and thought, oh well is must be a beta issue, but then 2017 started doing it as well.
The only thing that had changed as far as I was aware is that I wasn’t at home, and link no longer valid didn’t make much sense yet alluded to a issue with the internet.
A quick peek at my firewall settings revealed that the Unity program is blocked when on a public network
But I’m not on a public network, ah Windows!
So to sort this out we are going to have to change the network type. There is more than one way to do this, but here’s how I went about it.
Click on the start button and click the settings button
Next Select Network and Internet
After that you’ll need to select wifi on the left and then click the active wireless network.
Next change the network profile from Public to Private
Wait a few moments before trying to start Unity again and voilà! You will be able to start Unity. Now go make some games!