I moved my site to a new host a few months ago. At that point it had five subdomain sites, all working fine.
Those subdomain sites still all work fine, but the new subdomain site I created today gives a 500 Internal Server Error when I try to access wp-admin pages.
The new subdomain site does show up -- it's only the admin pages I can't get to. I'm guessing there's some step in the blog-creation process that has failed -- can anyone give me a hint? One thing I know is different is the permissions for writing files are stricter. I can't use the WP back-end editors, so maybe there is some file where some information should have been written during the new blog creation which failed silently?
Tips much appreciated. Site is litsam.com and the failing blog is bookstore.litsam.com.