Hey @%{original_poster_username,fallback:there}, welcome to the Nextcloud community and thanks for supporting Nextcloud snap 
Sorry to hear you are having issues with your Nextcloud snap installation. If you’ve come this far, you’re on the right track! 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.
In order to help you we’ll need some Information to get an Idea of your setup, so complete the required support template if you haven’t done so already or run the debugging script and post the result here.
Below are some links to how-to’s answering frequently asked questions and may help you help yourself;