Install PositiveSSL

How to install PositiveSSL certificate in virtualmin running apache? After following instruction from http://www.virtualmin.com/documentation/id,ssl_and_virtualmin, at the Installing a Certificate section, I always get this error:
Failed to install certificate : Missing or invalid signed SSL certificate : Data does not start with line -----BEGIN CERTIFICATE-----

Howdy,

Someone recently had that same problem… the fellow here explains how he resolved it in the last comment in the thread.

Give this a try, and see if that resolves the issue for you:

https://www.virtualmin.com/node/24608