Save option in proxy settings grayed out

I am trying to install about on my nexus 4 running kit Kat. I follow all instructions but once I try to save the changes the save icon is grayed out so nothing gets saved. How do I solve this problem?
Ads were yesterday!
https://adblockplus.org/forum/
BinaryMood wrote:I've fixed the problem on my side..
Just re-enter your wifi password, save button will be enable.
BinaryMood wrote:....I still get a message that Proxy works only on HTTP connexion, which means only via your browser.
This must be investigated by Adblock plus dev team