Select the “Pure Vanilla”-server
Click on Edit
Set “Server Resource Packs” to Prompt
Connect to the Server and click Yes
Enjoy your Reindeer
Sorry for the late reply, the issue still sometimes happens but I can get on about half of the time.
When I do get kicked it either says that the connection was severed by a remote host or that I was kicked by a remote host.
I think it might just be a issue on my end.
Thank you for your time and please have a nice day.