I installed by myself my purchased copy of Unlimited PHP... (very easy to do... I'm not an expert...) with all the permissions correctly set.
It works if I run it manually but, after about 5 minutes, it stops displaying like shown in the below image...
Seems that runs on steps, and then stops. Where's the problem?
Sitemap.xml always remains "empty" at 0 bytes
(see the attached image)