I want to add a theme to a website on which I'm running Wordpress, but every time I go to /wp-admin/themes.php, I get a 500 Internal Server Error message. I checked my Wordpress directory via a command-line program, and themes.php is there and has the same permissions as the other php files. I even downloaded the file to my Mac for safekeeping, then went to Github, got the latest themes.php code, and substituted that for the old file. Still no luck. The other options in the Appearance menu work fine. I called Sonic support, but they said they don't support Wordpress. I don't know what else to do, since this seems to be an error on their server. Any ideas?
p.s. I also just noticed that I'm getting a 500 error on Dashboard > Updates and Plugins > Installed Plugins.
p.s. I also just noticed that I'm getting a 500 error on Dashboard > Updates and Plugins > Installed Plugins.