This article was created in response to a support issue logged with K2. The content may include typographical errors and may be revised at any time without notice. This article is not considered official documentation for K2 software and is provided "as is" with no warranties.
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Unable to activate the site collection after upgrading to 4.7.
After upgrading to 4.7, the following error message appears: The default K2 Server ([INVALID_K2_SERVER_URL]) is unavailable. Please contact your K2 administrator for more information.
1. Go to the K2 Settings list of the site to be activated.
[SharePoint Site URL]/Lists/K2%20Settings
2. Ensure that none of the items have values that reference an invalid K2 server URL.