Hi Thanks for the help.

Look, I notice that the config.hp file is blnak too, it has nothing...
What could be the problem?

The "config.php.default" file has this:

<?php

define('OW_DIR_USERFILES', OW_DIR_ROOT.'ow_userfiles'.DS);
define('OW_DIR_STATIC', OW_DIR_ROOT.'ow_static'.DS);
define('OW_DIR_PLUGINFILES', OW_DIR_ROOT.'ow_pluginfiles/');

define('OW_DEBUG_MODE', false);
define('OW_DEV_MODE', false);
define('OW_INSTALL_PLUGINS', false);
define('OW_PASSWORD_SALT', 'oxwall_salt_SK750');
define('OW_PROFILER_ENABLE', false);
 
define('OW_DIR_CORE', OW_DIR_ROOT.'ow_core'.DS);
define('OW_DIR_INC', OW_DIR_ROOT.'ow_includes'.DS);
define('OW_DIR_LIB', OW_DIR_ROOT.'ow_libraries'.DS);
define('OW_DIR_UTIL', OW_DIR_ROOT.'ow_utilities'.DS);
define('OW_DIR_PLUGIN', OW_DIR_ROOT.'ow_plugins'.DS);
define('OW_DIR_THEME', OW_DIR_ROOT.'ow_themes'.DS);
define('OW_DIR_SYSTEM_PLUGIN', OW_DIR_ROOT.'ow_system_plugins'.DS);
define('OW_DIR_SMARTY', OW_DIR_ROOT.'ow_smarty'.DS);
 
define('OW_USE_CLOUDFILES', false);

I hadn´t done any plugin or theme instalation before this, I saw the site working fine.
I have the "MyDiary" theme, but I can find it in the Themes page.

That is default config.php file

Do you have a backup of your website?

I think my provider has it...

But I have another oxwall scripts that have the same problem

And the last one presents some issue like that, but presents at least a page with a message.

What can I do?

This is internal server error, it is a server related issue. You need to contact your hosting provider to resolve it. 

Topic was moved from General Questions.