e-Newsletter plugin 503 Service Unavailable

e-Newsletter plugin, click on create newsletter and get a 503 error everytime. this is a pretty simple site, we haven't made any big changes recently. I confirmed with host there is no maintenance going on in the server and this problem has been happening for almost a week now it appears. no other plugins seem to be having problems, and deactivating other plugins did not seem to have any effect on this error. I also tried deleting and reinstalling the plugin to no avail. What else can be done? i did already grant support access.