Hi, ancienthorror, welcome to the forums.
Firstly, when you post an image to the forums you need to link to the actual image file itself, you linked the web page that it's on which would work as a standard link but not within image tags.
Here you go:
Anyway, I can't really help you with the Happy Cloud issue as I've never used it and never would. My recommendation would be to get rid of it and download LotRO from a full download installer source; Pando or Steam. It does seem to cause people a lot of issues in trying to launch the client when they use it.
Submit a ticket to SSG here
Please reply to the topic or PM me if a solution I posted works for you: The more data I can gather the better I can help.
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