diff --git a/schedule/parse.php b/schedule/parse.php
index fa7956f..317b916 100644
--- a/schedule/parse.php
+++ b/schedule/parse.php
@@ -13,8 +13,8 @@ function parseData($config, $data) {
 			'locale' => 'bg_BG.UTF8'
 		)
 	);
-	
-	if ($data === false) return false; 
+
+	if ($data === false) return false;
 
 	// We need to set these so we actually parse properly the dates. WP fucks up both.
 	date_default_timezone_set('Europe/Sofia');
@@ -24,7 +24,7 @@ function parseData($config, $data) {
 	$data['slots'] = array_filter($data['slots'], function($slot) {
 		return isset($slot['starts_at'], $slot['ends_at'], $slot['hall_id'], $slot['event_id']);
 	});
-	
+
 	// Collect the slots for each hall, sort them in order of starting
 	$slots = [];
 	$timestamps = [];
@@ -37,7 +37,7 @@ function parseData($config, $data) {
 
 	foreach ($data['halls'] as $hall_id => $hall) {
 		$slots[$hall_id] = [];
-		
+
 		foreach ($data['slots'] as $slot_id => $slot) {
 			if ($slot['hall_id'] !== $hall_id) {
 				continue;
@@ -48,11 +48,11 @@ function parseData($config, $data) {
 			if ($etype !== $filtered_type_id && !is_null($filtered_type_id)) {
 				continue;
 			}
-			
+
 			if (!in_array($slot['starts_at'], $timestamps)) {
 				$timestamps[] = $slot['starts_at'];
 			}
-			
+
 			if (!in_array($slot['ends_at'], $timestamps)) {
 				$timestamps[] = $slot['ends_at'];
 			}
@@ -62,26 +62,26 @@ function parseData($config, $data) {
 		ksort($slots[$hall_id]);
 		if (empty($slots[$hall_id])) unset($slots[$hall_id]);
 	}
-	
+
 	sort($timestamps);
-	
+
 	// Find all microslots (the smallest time unit)
 	$microslots = [];
 	$lastTs = 0;
 	$first = true;
-	
+
 	foreach ($timestamps as $ts) {
 		if ($first) {
 			$lastTs = $ts;
 			$first = false;
 			continue;
 		}
-		
+
 		if (date('d.m', $lastTs) !== date('d.m', $ts)) {
 			$lastTs = $ts;
 			continue;
 		}
-		
+
 		$microslots[] = [$lastTs, $ts];
 		$lastTs = $ts;
 	}
@@ -90,10 +90,10 @@ function parseData($config, $data) {
 
 	foreach ($data['halls'] as $hall_id => $hall) {
 		$hall_data = [];
-		
+
 		foreach ($microslots as $timestamps) {
 			$found = false;
-			
+
 			foreach ($data['slots'] as $slot_id => $slot) {
 				if (
 					$slot['hall_id'] === $hall_id &&
@@ -106,7 +106,7 @@ function parseData($config, $data) {
 							continue;
 						}
 					}
-					
+
 					$found = true;
 					$hall_data[] = [
 						'event_id' => $slot['event_id'],
@@ -116,12 +116,12 @@ function parseData($config, $data) {
 					break;
 				}
 			}
-			
+
 			if (!$found) {
 				$hall_data[] = null;
 			}
 		}
-		
+
 		$events[$hall_id] = $hall_data;
 	}
 	// Remove halls with no events after filtering
@@ -146,25 +146,25 @@ function parseData($config, $data) {
 	foreach($events as $i => $val) {
 		$hall_count = count($events[$i]);
 		$hasEvents = false;
-		
+
 		for ($j = 0; $j < $hall_count; ++$j) {
 			if (!is_null($events[$i][$j]) && $events[$i][$j]['edge']) {
 				$hasEvents = true;
 				continue 2;
 			}
 		}
-		
+
 		if (!$hasEvents) {
 			unset($events[$i]);
 		}
 	}
-	
+
 	// Merge events longer than one slot
 	$prevEventId = [];
 	$prevEventSlot = [];
 	$prevSlotIndex = 0;
 	$first = true;
-	
+
 	foreach ($events as $slot_index => &$events_data) {
 		if ($first) {
 			$prevEventId = array_map(function($event_info) {
@@ -175,46 +175,46 @@ function parseData($config, $data) {
 			$first = false;
 			continue;
 		}
-		
+
 		foreach ($events_data as $hall_index => &$event_info) {
 			if (is_null($event_info)) {
 				$prevEventId[$hall_index] = null;
 				$prevEventSlot[$hall_index] = null;
 				continue;
 			}
-			
+
 			if ($event_info['event_id'] !== $prevEventId[$hall_index]) {
 				$prevEventId[$hall_index] = $event_info['event_id'];
 				$prevEventSlot[$hall_index] = null;
 				continue;
 			}
-			
+
 			// We have a long event
 			if (is_null($prevEventSlot[$hall_index])) {
 				$prevEventSlot[$hall_index] = $prevSlotIndex;
 			}
-			
+
 			$master_slot = &$events[$prevEventSlot[$hall_index]][$hall_index];
-			
+
 			if (!array_key_exists('rowspan', $master_slot)) {
 				$master_slot['rowspan'] = 2;
 			}
 			else {
 				++$master_slot['rowspan'];
 			}
-			
+
 			unset($master_slot);
-			
+
 			$event_info = false;
 		}
-		
+
 		unset($event_info);
-		
+
 		$prevSlotIndex = $slot_index;
 	}
-	
+
 	unset($events_data);
-	
+
 	// Build the HTML
 	$schedule_body = '';
 	$lastTs = 0;
@@ -226,36 +226,36 @@ function parseData($config, $data) {
 
 	foreach ($events as $slot_index => $events_data) {
 		$columns = [];
-		
+
 		if (date('d.m', $microslots[$slot_index][0]) !== date('d.m', $lastTs)) {
 			$schedule_body .= '<tr><th colspan="' . (count($events_data) + 1) . '">' . strftime('%d %B - %A', $microslots[$slot_index][0]) . '</th></tr>';
 		}
-		
+
 		$lastTs = $microslots[$slot_index][0];
 		$lastEventId = 0;
 		$colspan = 1;
-		
+
 		foreach ($events_data as $event_info) {
 			if ($event_info === false) {
 				continue;
 			}
-			
-			if (is_null($event_info['event_id'])) {
+
+			if (is_null($event_info) || is_null($event_info['event_id'])) {
 				$columns[] = '<td>&nbsp;</td>';
 				continue;
 			}
-			
+
 			if (!in_array($event_info['hall_id'], $hall_ids)) {
 				$hall_ids[] = $event_info['hall_id'];
 			}
-			
+
 			$eid = &$event_info['event_id'];
 			$event = &$data['events'][$eid];
 
 #			var_dump($microslots[$slot_index]);
 			$title = mb_substr($event['title'], 0, $config['cut_len']) . (mb_strlen($event['title']) > $config['cut_len'] ? '...' : '');
 			$speakers = '';
-			
+
 			if (count($event['participant_user_ids']) > 0) {
 				$spk = [];
 
@@ -267,10 +267,10 @@ function parseData($config, $data) {
 					$name = $data['speakers'][$uid]['first_name'] . ' ' . $data['speakers'][$uid]['last_name'];
 					$spk[] = '<a class="vt-p" href="#' . $name . '">' . $name . '</a>';
 				}
-				
+
 				$speakers = implode (', ', $spk);
 			}
-			
+
 			if ($microslots[$slot_index][0] < $now) {
 				// talk has already started. Provide feedback links
 				$fullfb = '<p align=right><strong><a href="https://cfp.openfest.org/events/' . $eid . '/feedback/new">'.pll__('Submit feedback').'</a></strong></p>';
@@ -284,7 +284,7 @@ function parseData($config, $data) {
  			if (!isset($known_events[$eid])) {
  			//if (!in_array($data['events'][$event_info['event_id']]['track_id'], $config['hidden_language_tracks']) && !isset($known_events[$eid])) {
 				$fulltalks .= '<section id="lecture-' . $eid . '">';
-				
+
 				// We don't want '()' when we don't have a speaker name
 				$fulltalk_spkr = strlen($speakers) > 0 ? (' (' . $speakers . ')') : '';
 				$fulltalks .= '<p><strong>' . htmlentities($event['title']) . ' ' . $fulltalk_spkr . '</strong></p>';
@@ -293,7 +293,7 @@ function parseData($config, $data) {
 				$fulltalks .= '<div class="separator"></div></section>';
 				$known_events[$eid] = $eid;
 			}
-			
+
 			if ($eid === $lastEventId) {
 				array_pop($columns);
 				++$colspan;
@@ -303,50 +303,50 @@ function parseData($config, $data) {
 			}
 
 			$rowspan = array_key_exists('rowspan', $event_info) ? (' rowspan="' . $event_info['rowspan'] . '"') : '';
-			
+
 			// CSS
 			$cssClasses = [];
-			
+
 			if (!in_array($event['track_id'], $config['hidden_language_tracks'])) {
 				$cssClasses[] = 'schedule-' . $event['language'];
 			}
-			
+
 			$cssClass = $data['tracks'][$event['track_id']]['css_class'];
-			
+
 			if (strlen($cssClass) > 0) {
 				$cssClasses[] = $cssClass;
 			}
-			
+
 			$cssClasses = count($cssClasses) > 0 ? (' class="' . implode(' ', $cssClasses) . '"') : '';
 
 			// Render cell
 			$columns[] = '<td' . ($colspan > 1 ? ' colspan="' . $colspan . '"' : $rowspan) . $cssClasses . '>' . $content . $progfb . '</td>';
-			
+
 			$lastEventId = $eid;
 			unset($eid, $event);
 		}
-		
+
 		$schedule_body .= '<tr><td>';
 		$schedule_body .= date('H:i', $microslots[$slot_index][0]) . ' - ' . date('H:i', $microslots[$slot_index][1]);
 		$schedule_body .= '</td>';
 		$schedule_body .= implode('', $columns);
 		$schedule_body .= '</tr>';
 	}
-	
+
 	$schedule = '<table cellpadding="0" cellspacing="0" style="text-align: center;" class="schedule"><thead><tr><th></th>';
-	
+
 	foreach ($data['halls'] as $hall_id => $hall) {
 		if (!in_array($hall_id, $hall_ids)) {
 			continue;
 		}
-		
+
 		$schedule .= '<th>' . $hall[$config['lang']] . '</th>';
 	}
-	
+
 	$schedule .= '</tr></thead><tbody>';
 	$schedule .= $schedule_body;
 	$schedule .= '</tbody></table>';
-	
+
 	// Create the legend
 	$legend = '';
 
@@ -360,7 +360,7 @@ function parseData($config, $data) {
 	foreach ($languages as $code => $lang) {
 		$legend .= '<tr><td class="schedule-' . $code . '">' . $lang['name'] . '</td></tr>';
 	}
-	
+
 	// Speaker list
 	$gspk = '<div class="grid members">';
 	$fspk = '';
@@ -388,16 +388,16 @@ function parseData($config, $data) {
 		$gspk .= '</a> </div>';
 
 		$fspk .= '<div class="speaker" id="' . $name . '">';
-		$fspk .= '<img width="100" height="100" src="' . $config['cfp_url'] . $speaker['picture']['schedule']['url'] . '" class="attachment-100x100 wp-post-image" alt="' . $name . '" />'; 
+		$fspk .= '<img width="100" height="100" src="' . $config['cfp_url'] . $speaker['picture']['schedule']['url'] . '" class="attachment-100x100 wp-post-image" alt="' . $name . '" />';
 		$fspk .= '<h3>' . $name . '</h3>';
 		$fspk .= '<div class="icons">';
-		
+
 		foreach ($types as $type => $param) {
 			if (!empty($speaker[$type])) {
 				$fspk .= '<a href="' . $param['url'] . $speaker[$type] . '"><i class="fa fa-' . $param['class'] . '"></i></a>';
 			}
 		}
-		
+
 		$fspk .= '</div>';
 		$fspk .= '<p>' . htmlentities($speaker['biography']) . '</p>';
 		$fspk .= '</div><div class="separator"></div>';