After almost a month of flawless operation my Nextcloud will not load from my duckdns address and I can't access it from my mobile client. I know it is still there because if I add /index.php/apps/files/?dir=/&fileid=7 to my duckdns.org address in my browser it pops up and navigates through all of the folders and apps. Also Heimdall has stopped working. When I enter its address in the browser all I get on a blank screen is "You are missing php-zip". I also added Watchtower to my OMV this last week as well as attempting a pi-hole install. I abandoned pi-hole on that machine and deleted the container and image. Watchtower appeared to be working as desired, updating several images successfully. I am afraid that my pi-hole debacle and/or Watchtower have spiked my server somehow.
The OMV server itself has not given any warnings, and appears to be working fine. I haven't any idea where to start looking, or what to look for. Can someone please point me in the right direction? I have been searching in the forums and can't spot anything like this.