I am having a similar issue
Resource interpreted as Stylesheet but transferred with MIME type text/html: “http://104.236.6.189/themes/SuiteR/css/colourSelector.php”.
index.php?module=Home&action=index&parentTab=All:763
Resource interpreted as Document but transferred with MIME type image/gif: “http://104.236.6.189/index.php?entryPoint=getImage&imageName=blank.png”.
I copied that file and overwrote the existing colourSelector.php but I’m still getting the same error.
Please help.