I have a few custom workflows created by another developer on my dev sharepoint farm. We recently realized that you can apparently not just migrate these things with the rest of the content in a site/site collection. In order to get them working I was going to create new workflows in production and copy the steps, etc into the new farm. However, the dev farm is giving me the error "Unable to load workflow actions from the server. Please contact your server administrator" as if that person would know. I am the server administrator, and I do not know how to solve that problem. Looking around the web I have seen several suggestions and I have tried all of them that seemed feasible and apply to my situation.
One solution suggested using Fiddler to snoop the HTTP transactions for any missing/broken requests. One such request stood out: I got a 500 error for /_vti_bin/webpartpages.asmx
I then dutifully went to my web browser and successfully opened it there. I have a feeling this is where my problem is but I don't have any issues opening the workflows in production. How can I get this to work?
** UPDATE 10/16/2012 **
Still no luck updating this. I put in a ticket with the Microsoft Partner Network and I think they gave up on it, too. Has anybody else ever experienced this issue?