There are various factors that could cause an issue with your Nextcloud snap instance. Your logs may help find a probable cause. There is a good chance someone in the community has had a similar issue and knows how to resolve it. That depends on how you request assistance. So read your request for tone, avoiding hyperbole and assuming good intentions.

Since snaps are Ubuntu-centric, its no surprise that Nextcloud snap was designed to run on Ubuntu and the reason why Ubuntu is the only supported distribution for Nextcloud snap.

If you're having a Nextcloud snap issue and you've come this far, then you're on the right track!

1. Ensure nothing was missed:
   • check the requirements
   • consult our Wiki
   • check configuration
   • consult the FAQ's
   • check for similar issues
   • check upstream issues
2. Having an issue with a third party app? Please Log an issue against the app
3. Run the debugging script before raising an issue
4. Create an issue and complete the bug report (the more information the better)

Depending on the type of failure you've experienced, there is a good chance of recovering your data. By default all the stuff you care about is in the /var/snap/nextcloud directory. So just copy the entire directory to another drive or machine. In the worst case you could lose your database, but at least you'll preserve your raw data. Your data can be found in /var/snap/nextcloud/common/nextcloud/data if you haven't changed your data directory. See where is my stuff.

Not having a backup makes a bad situation worse. There is nothing anyone can do if you don't backup your data. A good backup strategy will enable data recovery in the case of disaster. So depending on your backup frequency and how often you practice restoring your backup, you'll have a good chance of system recovery within a couple of hours with limited data loss. See backup, restore & migrate Nextcloud snap.