Hi Ralf,
Yes, I can access as admin, no problem now. I’m sorry I haven’t replied sooner, I’ve been on training today.
Indeed yes, when building a View, you need to ensure that the fields you select exist in the content type you have defined! Otherwise, as you saw, there is a blank… because that field doesn’t exist…
Honestly, I have never use the “CERN agenda item” component as a field, so I wouldn’t personally use that.
OK…
There is a new page with that view at /afc … so, what I interested to know now is how to transform that into the nice layout of the Ongoing and Upcoming events you showed me.
You can follow the instructions at: Sign in to CERN
The actual View configuration will look similar to this (which is very simple):
The layout is completed using the ‘Format’ section here in the View… which calls upon format configurations you’ve done to your content type (described at Sign in to CERN )
DO NOT inject your own CSS - there is no need (certainly not at this point while setting everything up). A large amount of automatic formatting has been prepared for us by the Drupal Team, so best lean on that first and THEN decide if you need to change anything.
Ping me on Mattermost (@ noble) if you need more - faster response and I can explain stuff there 
We can update this ticket a bit later with the result after you’ve understood how it all works more.
By the way - did you do the basic Drupal training at CERN? Just so I can get an idea of what you’re likely to know.
-cath