Issue with new installation - doing certain tasks like sending test emails or adding users to a list results in a blank HTML page

So… I just installed version 3.6.6 and got things setup with the database et-al… it seems to be working pretty well until I tried to send a test message to a single email account (yes, that person was in the list)… and the once I hit the “send test” button it does a POST to the following URL:

Send Test

I can see in the Apache2 log that the POST returns a 200 so that’s ok… but I’m not sure why I see this.

Also, if I use the “import subscribers” feature under the subscribers area and select an existing empty list and type one email address and hit the “import emails” button… the same thing happens… a POST is done and that results in a blank page on the browser.

I’m sure something must be amiss in my installation but I’m not sure even where to start…

Any suggestions?

Same here. This is dated 2.5 years ago – does anyone answer these issues?