Hello and welcome to the community. 
A security program on your PC or network is interfering with the download.
See here for full troubleshooting: I can’t Install WeMod / "There was a error installing the application" - #2 by Ravenfyre
Hello and welcome to the community.
A security program on your PC or network is interfering with the download.
See here for full troubleshooting: I can’t Install WeMod / "There was a error installing the application" - #2 by Ravenfyre