Apache doesn't start when adding phpPgAdmin lines to httpd-xampp.conf? how to fix, or where to look?

Question

PHP

PhpPgAdmin is located at C:\xampp\phpPgAdmin
When added to a block

<IfModule alias_module>
...
    Alias /phppgadmin "С:/xampp/phpPgAdmin/"
    <Directory "С:/xampp/phpPgAdmin">
        AllowOverride AuthConfig
        Require local
        ErrorDocument 403 /error/XAMPP_FORBIDDEN.html.var
    </Directory>
...
</IfModule>

An error occurs when starting Apache:

11:44:18  [Apache] 	Error: Apache shutdown unexpectedly.
11:44:18  [Apache] 	This may be due to a blocked port, missing dependencies, 
11:44:18  [Apache] 	improper privileges, a crash, or a shutdown by another method.
11:44:18  [Apache] 	Press the Logs button to view error logs and check
11:44:18  [Apache] 	the Windows Event Viewer for more clues
11:44:18  [Apache] 	If you need more help, copy and post this
11:44:18  [Apache] 	entire log window on the forums

There is nothing in apache/error.logs relating to this time.
How to fix, or where to look?