Not able to install Bonfire

[sreevidya belluru]

I am not able to install bonfire. I am getting the folling error when clicked on - Install Bonfire, exploratory testing for agile teams. Free for 30 days! "Failed to obtain the details of plugin with key com.atlassian.bonfire.plugin-key. Status: 404. URL: /rest/plugins/1.0/available/com.atlassian.bonfire.plugin-key." Also, in administration, when clicked on Addon, I am getting the following message. "The Atlassian Marketplace server is not reachable. To avoid problems when loading this page, you can disable the connection to the Marketplace server." I want to install bonfire and try if it can be helpful for my team. Please sugget how to proceed further

[Janet Albion]

If your JIRA is version 5.0.7 and below, you might encounter the known problem discussed at https://confluence.atlassian.com/display/JIRAKB/The+Atlassian+Marketplace+server+is+not+reachable.+PacException%3A+404

Otherwise, most likely you have connection issue between JIRA server and Market Place. For troubleshooting guide, you may refer to https://confluence.atlassian.com/display/UPM/Problems+Connecting+to+the+Atlassian+Marketplace