Our webhosting provider notified me about a scheduled maintenance of the server rich-snippets.io is running on. Therefore it might be that our website is not reachable for 60 minutes between Monday May 6, 2019 11pm and Tuesday May 7, 2019 5am (CEST timezone).
It can be that SNIP will not be able to retrieve any data from the API that is on this server. Please wait for 60 minutes in order to continue your work with Structured Data.
Sorry for the inconvenience caused by this.