diff --git a/phpBB/docs/CHANGELOG.html b/phpBB/docs/CHANGELOG.html
index 952304b836..1d3abd62bc 100644
--- a/phpBB/docs/CHANGELOG.html
+++ b/phpBB/docs/CHANGELOG.html
@@ -95,6 +95,7 @@
 		<li>[Fix] Correctly show private message history (Bug #46065 - Patch by bantu)
 		<li>[Fix] Various XHTML mistakes in prosilver and subsilver2. (Bugs #38555, #45505 - Patch by Raimon, #45785, #45865)</li>
 		<li>[Fix] Move post bump information markup to the template. (Bug #34295 - Patch by bantu)</li>
+		<li>[Fix] Show error in the ACP when template folder is not readable. (Bug #45705 - Patch by bantu)</li>
 		<li>[Change] Change the data format of the default file ACM to be more secure from tampering and have better performance.</li>
 		<li>[Change] Add index on log_time to the log table to prevent slowdown on boards with many log entries. (Bug #44665 - Patch by bantu)</li>
 		<li>[Feature] Backported 3.2 captcha plugins.</li>
diff --git a/phpBB/includes/acp/acp_attachments.php b/phpBB/includes/acp/acp_attachments.php
index ef20b48cec..de4092036e 100644
--- a/phpBB/includes/acp/acp_attachments.php
+++ b/phpBB/includes/acp/acp_attachments.php
@@ -694,7 +694,7 @@ class acp_attachments
 
 						$imglist = filelist($phpbb_root_path . $img_path);
 
-						if (sizeof($imglist))
+						if (!empty($imglist['']))
 						{
 							$imglist = array_values($imglist);
 							$imglist = $imglist[0];
diff --git a/phpBB/includes/acp/acp_styles.php b/phpBB/includes/acp/acp_styles.php
index 184c40f218..48802c79df 100644
--- a/phpBB/includes/acp/acp_styles.php
+++ b/phpBB/includes/acp/acp_styles.php
@@ -827,6 +827,11 @@ parse_css_file = {PARSE_CSS_FILE}
 			unset($file_info);
 		}
 
+		if (empty($filelist['']))
+		{
+			trigger_error($user->lang['NO_TEMPLATE'] . adm_back_link($this->u_action), E_USER_WARNING);
+		}
+
 		// Now create the categories
 		$filelist_cats[''] = array();
 		foreach ($filelist as $pathfile => $file_ary)
diff --git a/phpBB/includes/functions_admin.php b/phpBB/includes/functions_admin.php
index 79282c0358..a1f34792e0 100644
--- a/phpBB/includes/functions_admin.php
+++ b/phpBB/includes/functions_admin.php
@@ -359,7 +359,7 @@ function get_forum_branch($forum_id, $type = 'all', $order = 'descending', $incl
 */
 function filelist($rootdir, $dir = '', $type = 'gif|jpg|jpeg|png')
 {
-	$matches = array();
+	$matches = array($dir => array());
 
 	// Remove initial / if present
 	$rootdir = (substr($rootdir, 0, 1) == '/') ? substr($rootdir, 1) : $rootdir;