Problema com meu site

Ao tentar entrar no meu wp-admin, o painel fica com a tela somente HTML básico:

View post on imgur.com

E ao clicar em qualquer opção recebo o seguinte erro:
Forbidden
You don’t have permission to access /wp-admin/edit.php on this server.

Possible causes of this error include:

The request was forbidden by rules in the .htaccess file.
The directory you requested does not have an index.html or index.php file.
The permissions on the file or directory are incorrect.
For details about why the request was forbidden, see the Apache error log at:

/srv/users/SYSUSER/log/APPNAME/APPNAME_apache.error.log

A página que eu preciso de ajuda: [fazer login para ver o link]