I think I found what was the matter, and fix it
components/com_speasyimagegallery/views/album/tmpl/default.php
code
if($gutter || $gutter_sm || $gutter_xs) {
$css = '';
if($gutter) {
$css .= '.speasyimagegallery-row {margin: -' . $gutter . 'px;}';
$css .= '.speasyimagegallery-row > div > .speasyimagegallery-gallery-item {padding: ' . $gutter . 'px;}';
}
replaced by code
if($gutter || $gutter_sm || $gutter_xs) {
$css = '';
if($gutter) {
$css .= '.speasyimagegallery-row {margin: ' . $gutter . 'px;}';
$css .= '.speasyimagegallery-row > div > .speasyimagegallery-gallery-item {padding: ' . $gutter . 'px;}';
}
{margin: -' . $gutter . 'px;}
"-" before ' . $gutter