diff --git a/src/BaseModule.php b/src/BaseModule.php
index ce7774bfd0..a9f67f2375 100644
--- a/src/BaseModule.php
+++ b/src/BaseModule.php
@@ -140,6 +140,10 @@ abstract class BaseModule
 			return false;
 		}
 
+		if (empty($a->user)) {
+			return false;
+		}
+
 		$sec_hash = hash('whirlpool', $a->user['guid'] . $a->user['prvkey'] . session_id() . $x[0] . $typename);
 
 		return ($sec_hash == $x[1]);
diff --git a/src/Module/Search/Acl.php b/src/Module/Search/Acl.php
index eb6dc6f859..e8b6f357d9 100644
--- a/src/Module/Search/Acl.php
+++ b/src/Module/Search/Acl.php
@@ -350,7 +350,7 @@ class Acl extends BaseModule
 						'type'    => 'c',
 						'photo'   => Contact::getMicro($contact),
 						'name'    => htmlspecialchars($contact['name']),
-						'id'      => intval($contact['cid']),
+						'id'      => intval($contact['id']),
 						'network' => $contact['network'],
 						'link'    => $contact['url'],
 						'nick'    => htmlentities(($contact['nick'] ?? '') ?: $contact['addr']),
diff --git a/src/Module/Settings/UserExport.php b/src/Module/Settings/UserExport.php
index 0eaa72ffe6..132505371e 100644
--- a/src/Module/Settings/UserExport.php
+++ b/src/Module/Settings/UserExport.php
@@ -114,14 +114,11 @@ class UserExport extends BaseSettings
 		$rows = DBA::p($query);
 		while ($row = DBA::fetch($rows)) {
 			$p = [];
-			foreach ($row as $k => $v) {
-				switch ($dbStructure[$table]['fields'][$k]['type']) {
-					case 'datetime':
-						$p[$k] = $v ?? DBA::NULL_DATETIME;
-						break;
-					default:
-						$p[$k] = $v;
-						break;
+			foreach ($dbStructure[$table]['fields'] as $column => $field) {
+				if ($field['type'] == 'datetime') {
+					$p[$column] = $v ?? DBA::NULL_DATETIME;
+				} else {
+					$p[$column] = $v;
 				}
 			}
 			$result[] = $p;
diff --git a/src/Protocol/DFRN.php b/src/Protocol/DFRN.php
index 064f1f3aca..b09c1bea0f 100644
--- a/src/Protocol/DFRN.php
+++ b/src/Protocol/DFRN.php
@@ -963,10 +963,12 @@ class DFRN
 		if ($item['gravity'] != GRAVITY_PARENT) {
 			$parent_item = (($item['thr-parent']) ? $item['thr-parent'] : $item['parent-uri']);
 			$parent = Item::selectFirst(['guid', 'plink'], ['uri' => $parent_item, 'uid' => $item['uid']]);
-			$attributes = ["ref" => $parent_item, "type" => "text/html",
-						"href" => $parent['plink'],
-						"dfrn:diaspora_guid" => $parent['guid']];
-			XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
+			if (DBA::isResult($parent)) {
+				$attributes = ["ref" => $parent_item, "type" => "text/html",
+					"href" => $parent['plink'],
+					"dfrn:diaspora_guid" => $parent['guid']];
+				XML::addElement($doc, $entry, "thr:in-reply-to", "", $attributes);
+			}
 		}
 
 		// Add conversation data. This is used for OStatus
diff --git a/view/theme/frio/php/default.php b/view/theme/frio/php/default.php
index ca661c2830..949417ccf2 100644
--- a/view/theme/frio/php/default.php
+++ b/view/theme/frio/php/default.php
@@ -71,7 +71,7 @@ $is_singleuser_class = $is_singleuser ? "is-singleuser" : "is-not-singleuser";
 			}
 		}
 
-		$nav_bg = $nav_bg ?: DI::pConfig()->get($uid, 'frio', 'nav_bg', DI::config()->get('frio', 'nav_bg', '#708fa0'));
+		$nav_bg = $nav_bg ?? DI::pConfig()->get($uid, 'frio', 'nav_bg', DI::config()->get('frio', 'nav_bg', '#708fa0'));
 
 		echo '<meta name="theme-color" content="' . $nav_bg . '" />';
 ?>