Error 500 - No Access
Using Jamroom
Sorry - I was assuming that this is a new Jamroom install in a new sub-folder. Are you saying that it has been working for years and has only been doing this for the past few weeks?
Notwithstanding that, the issue is still the same, so presumably either you or your host did something to change things. Making that Jamroom folder viewable should be straightforward and something your host can do for you.
Suggestion -
1) Temporarily add a file called index.html to the folder with the following content -
<html>
<head>
<title>Test Page</title>
</head>
<body>
<h1>Hello World!!</h1>
</body>
</html>
2) Temporarily rename the .htaccess file to saved.htaccess
3) Contact your host asking them to fix up the permissions for this folder. When you can access
http://animatedfilmmakers.com/devilsangelsanddating and see 'Hello World!!' you know this is now working.
4) Delete the temporary index.html file and revert the saved.htaccess file to its original .htaccess
5) You should now see your Jamroom site.
hth