This error means Battle.net Agent (the process that installs and patches our games) couldn't stream necessary files.
How to resolve this problem when downloading an update
Something went wrong while trying to install. Please try again.
Something went wrong while trying to install. Please try again.
Something went wrong while trying to install. Please try again.
Something went wrong while trying to install. Please try again.
Something went wrong while trying to install. Please try again.
Something went wrong while trying to install. Please try again.
Troubleshooting steps for connection problems
Troubleshooting steps to resolve this error message in World of Warcraft.