Hi mxc4,
This is strange on your end as I have tested this with a Windows docker installed CMS on my end and the data worked like a charm when I basically just re-added the raw data I see in your dataset.json that came with the exported layout.
Could you please check that the ports below are not blocked in your server?
Players connect to the CMS on TCP/80 or TCP/443 (depending on whether you have SSL enabled on your CMS or not), and from 1.8.0 onwards, TCP/9505.
You need to allow those inbound to the CMS. There’s no connections from the CMS to the Players so in most cases there’s no need to make firewall rule changes Player side. Reference here.
Also if you are using a proxy server, content filtering or network shaping system that those ports are whitelisted?
Also, just to further isolate, could you try to create a trial CMS. Try to recreate your layout and dataset to confirm if they work and its just in your environment for some reason that the layouts does not seem to fetch the data from the CMS to the player?
Hope to hear from you soon.
Kind regards,