Seems the installer tries to check from Apache, and remove it, but is unable to in the current version. The is some long threads that a number of us have been on that discusses this. See the below thread.
The belief is that an updated package now has a dependency on Apache2, and installs it after the check. The check also does not seem to see Apache2 even when you rerun the install scripts. Only a manual removal of Apache2 gets rid of it. The development team of MiaB is aware of the issue and is working to try to fix this in a future release.