We recently upgraded our 6.7 system to 6.7u1 and are now seeing this error in the browser's console log:
Refused to apply style from 'https://10.1.176.143/ui/plugins/css' because its MIME type ('text/html') is not a supported stylesheet MIME type, and strict MIME checking is enabled.
Browser is Chrome v69.
Our automation suite is failing because one of the things that it does is that it'll check the console to ensure that it doesn't contain any errors.
After digging into it a little, I see that the index.jsp in the h5ngc.war contains this line:
<link href="plugins/css" rel="stylesheet" type="text/css"/>
which seems to be causing the issue.
Is this a known problem?