Sepsano Honzou Sikorou, 29.11.2016:

Problem byl vyresen, jakmile jsem v souboru /local/stag/externallib.php na radku 28 coz je  'type'  => PARAM_ALPHANUMEXT,
prepsal na 'type'  => PARAM_TEXT,

Konkretne je treba zmenit tento kus kodu:

    private static $stag_attributes = array(
        'department'    => array(
            'type'  => PARAM_ALPHANUMEXT,
             'desc'  => "identification of the department in STAG"),
        'subject'       => array(
            'type'  => PARAM_ALPHANUMEXT,
            'desc'  => "Subject name taken from STAG"),
        'year'          => array(
            'type'  => PARAM_INT,
            'desc'  => "Year of the course"),
        'roakidno'      => array(
            'type'  => PARAM_ALPHANUMEXT,
            'desc'  => "ROAKIDNO value from STAG"),
        'sync'          => array(
            'type'  => PARAM_BOOL,
            'desc'  => "whether course is synchronized with STAG"),
        );
 
na 

    private static $stag_attributes = array(
        'department'    => array(
            'type'  => PARAM_TEXT,
            'desc'  => "identification of the department in STAG"),
        'subject'       => array(
            'type'  => PARAM_ALPHANUMEXT,
            'desc'  => "Subject name taken from STAG"),
        'year'          => array(
            'type'  => PARAM_INT,
            'desc'  => "Year of the course"),
        'roakidno'      => array(
            'type'  => PARAM_ALPHANUMEXT,
            'desc'  => "ROAKIDNO value from STAG"),
        'sync'          => array(
            'type'  => PARAM_BOOL,
            'desc'  => "whether course is synchronized with STAG"),
        );