All K2 sites are loading blank with no styling, and a MIME type error is seen in browser Dev Tools (F12)
kbt175683
PRODUCTIssue
All K2 sites are loading blank and appear to have no styling associated with them. This is generally seen during the original setup of a new K2 server, or if permissions have changed with the K2 Service Account.
Symptoms
All K2 sites such as Management, Designer, Workspace, and Runtime, will be showing as a blank page with no styling. When opening the F12 error console, you will see an error message similar to the following:
"Refused to apply style from 'company site/CombinedResource.ashx?d= because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled."
You might also notice one or several http 500 Internal Server errors that are thrown on calls to 'CombinedResource.ashx?d,' either in a network browser trace or the Windows Event Log. An example from the Windows Event Log:
"Failed to get resource: /Management/Styles/Themes/Platinum2/SourceCode.Forms.Controls.Web.ManagementControlPack.AssetControl.Resources.Styles.Main.css?_v=5.1008.19172.2 Exception: SourceCode.Forms.AppFramework.AsyncException: Asynchronous operation failed ---> System.Net.WebException: The remote server returned an error: (500) Internal Server Error."
Troubleshooting Steps
To resolve the issue, confirm that the associated K2 Service account has the required listed folder permissions here: https://help.k2.com/onlinehelp/K2Five/ICG/5.3/default.htm#Plan/Required-Permissions.htm.
Please see the below example of Service Account permissions on the K2Host ServerBin folder:
