Errors with instances after Amsterdam power outage

Summary:

A week ago, there was a power outage in Amsterdam. My instances were down during this time. Once the outage was solved, I try to restart my applications on those servers but I had several (permissions) problems.

Content (required):

First, the dashboard show me an error when I try to show the detail of one instance. (My instances are list correctly in the dashboard, but when I click on one to have the details, I see a "Either this resource doesn't exist, or you don't have permission to view it. Contact your administrator for help." error).

Secondly, I still can ssh on my instances but some services cannot restart because of permissions problem. For example, I have a ruby server (puma, to run a Ruby on Rails website). I can launch it by hand in the terminal, but I cannot launch it with systemd (service puma start). The error is that the script used by systemd have not the right to launch the puma binary. Same with wordpress and the php binary.