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[pilsen fcs rc4] If you try to access the internal http server from an IP address which is not allowed then IDE displays a dialog to allow access from this IP address. If you press No button to refuse the access then a page with an error message is send to the user which tries to access server. But the page has wrong content type so it is displayed in browser incorrectly - as a text.
The content-type is missing in the response generated by tomcat. That's not in our module so we are not going to fix this. The important fact is that the server sends code 403 Forbidden which is correct in such case.
Resolved for 3.3.x or earlier, no new info since then -> closing.