Presently a large number of NextCloud applications are unavailable.
This is because in a recent update something went wrong breaking one or more of the apps. With all of the apps enabled it just loads a white page, no errors or clues as to what is wrong even if I turn on php display_errors.
So to troubleshoot I’ve disabled all apps, which has allowed the page to load and am slowly enabling them to determine which is broken. This will take a while, please be patient.