I'm Creating Custom Module using Sitefinity Thunder. I'm Trying to Build the solution, it showing Error Message "the remote server returned an error: (407) Proxy Authentication Required".
I'm also Added Default Proxy in Web.config , but no luck :(
Some of our customers managed to solve this issue by turning the Detect Automatic Settings option off. I would suggest to turn the Detect Automatic Settings option off and give it another try. Here are the steps that need to be performed in order to do this:
I'm Using Latest version of Thunder(188.8.131.52) and Thunder Installed Manually with That Link only(what you mentioned) but No Luck.