[Maxximou5]

You had two additional ending brackets. Here is the corrected version.

Spoiler

/**
* Use this file to configure map lists.
*
* Each section is a map list that plugins can use. For example, the Admin Menu
* requests an "admin menu" map list, and you can control which maps appear via
* this file.
*
* Each section must have a property that explains where to read the maps from.
* There are two properties:
*
* target - Redirect the request to another section.
* file - Read a file of map names, in mapcycle.txt format.
*
* There is one section by default, called "mapcyclefile" - it is mapped to the
* mapcycle.txt file, or whatever the contents of your mapcyclefile cvar is.
*
* If a plugin requests a map list file which doesn't exist, or is empty, SourceMod
* tries the "default" section, and then the "mapcyclefile" section.
*/
"MapLists"
{
    /* Default requests go right to the mapcyclefile.*/
    "default"
    {
        "target" "mapcyclefile"
    }

    /* Admin menu, map menu */
    "sm_map menu"
    {
        "file" "umc_mapcycle.txt"
    }

    /* Admin menu, map voting menu */
    "sm_votemap menu"
    {
        "file" "umc_mapcycle.txt"
    }

    "randomcycle"
    {
        "target" "default"
    }

    /* For the "mapchooser" plugin */
    "mapchooser"
    {
        "target" "default"
    }

    /* For the "nominations" plugin */
    "nominations"
    {
        "target" "default"
    }
}