diff --git a/app/basic_operator_panel/index.php b/app/basic_operator_panel/index.php
index 2d4b243cb0..9502b0cfe1 100644
--- a/app/basic_operator_panel/index.php
+++ b/app/basic_operator_panel/index.php
@@ -98,7 +98,7 @@
 				//update the user_status
 					if (is_uuid($call_center_agent_uuid)) {
 						$esl = event_socket::create();
-						$switch_cmd .= "callcenter_config agent set status ".$call_center_agent_uuid." '".$user_status."'";
+						$switch_cmd = "callcenter_config agent set status ".$call_center_agent_uuid." '".$user_status."'";
 						$switch_result = event_socket::api($switch_cmd);
 					}
 
diff --git a/app/basic_operator_panel/resources/content.php b/app/basic_operator_panel/resources/content.php
index 5eeecd32de..0d234191f7 100644
--- a/app/basic_operator_panel/resources/content.php
+++ b/app/basic_operator_panel/resources/content.php
@@ -229,7 +229,7 @@ if (is_array($activity)) {
 		unset($block);
 
 		//filter by group, if defined
-		if ($_REQUEST['group'] != '' && substr_count($ext['call_group'], $_REQUEST['group']) == 0 && !in_array($extension, $_SESSION['user']['extensions'])) { continue; }
+		if ($_REQUEST['group'] != '' && substr_count($ext['call_group'] ?? '', $_REQUEST['group']) == 0 && !in_array($extension, $_SESSION['user']['extensions'])) { continue; }
 
 		//filter by extension or name, if defined
 		if (!empty($_REQUEST['filter'])) {
@@ -355,7 +355,7 @@ if (is_array($activity)) {
 		if ($ext['uuid'] == $ext['call_uuid'] && empty($ext['variable_bridge_uuid'])) { // transfer an outbound internal call
 			$call_identifier = $activity[$call_number ?? null]['uuid'] ?? null;
 		}
-		else if (($ext['variable_call_direction'] == 'outbound' || $ext['variable_call_direction'] == 'local') && $ext['variable_bridge_uuid'] != '') { // transfer an outbound external call
+		else if ((!empty($ext['variable_call_direction']) && ($ext['variable_call_direction'] == 'outbound' || $ext['variable_call_direction'] == 'local')) && !empty($ext['variable_bridge_uuid'])) { // transfer an outbound external call
 			$call_identifier = $ext['variable_bridge_uuid'];
 		}
 		else {
@@ -436,7 +436,7 @@ if (is_array($activity)) {
 		}
 
 		//build the list of extensions
-		$block = "<div id='".escape($extension)."' class='".$css_class."' ".(($_GET['vd_ext_from'] == $extension || $_GET['vd_ext_to'] == $extension) ? "style='border-style: dotted;'" : null)." ".(((empty($ext_state) || $ext_state != 'active') && $ext_state != 'ringing') ? "ondrop='drop(event, this.id);' ondragover='allowDrop(event, this.id);' ondragleave='discardDrop(event, this.id);'" : null).">"; // DRAG TO
+		$block = "<div id='".escape($extension)."' class='".$css_class."' ".(($_GET['vd_ext_from'] == $extension || $_GET['vd_ext_to'] == $extension) ? "style='border-style: dotted;'" : null)." ".(empty($ext_state) || ($ext_state != 'active' && $ext_state != 'ringing') ? "ondrop='drop(event, this.id);' ondragover='allowDrop(event, this.id);' ondragleave='discardDrop(event, this.id);'" : null).">"; // DRAG TO
 		$block .= "<table class='".$css_class."'>\n";
 		$block .= "	<tr>\n";
 		$block .= "		<td class='op_ext_icon'>\n";