Summary

Unable to install app from marketplace

Environment

.Jira Cloud

Diagnosis

From audit logs you could notice similar entries 

Audit log : Failed to install app plugin.xxxxxxxxxxx.atlassian-connect.json

Check the browser logs using develop tools and you might see similar error message.

errorMessage: "The app \"<appname>\" could not be installed as your site has not defined all of the required default groups. This affects the installation of all apps. Please see http://go.atlassian.com/nodefaultgroup for further information."

Cause

This issue is noticed when default product access group is not configured for all the subscribed products in Atlassian

Solution

Step 1 : Go to your site's Admin at admin.atlassian.com. If you're an admin for multiple sites or an organization admin, click the site's name and URL to open the Admin for that site.

Step 2 : Choose Product access on the left.

Step 3 : Under the product name, Click on ... next to the group → choose "Make default access group".

Step 4 : Once done, try to install the addon again.

More detail on product settings here