diff --git a/app/controllers/api/avatars.php b/app/controllers/api/avatars.php
index b6395774e9..0ac1cee056 100644
--- a/app/controllers/api/avatars.php
+++ b/app/controllers/api/avatars.php
@@ -521,7 +521,7 @@ App::get('/v1/avatars/initials')
         // if there is no space, try to split by `_` underscore
         $words = (count($words) == 1) ? \explode('_', \strtoupper($name)) : $words;
 
-        $initials = null;
+        $initials = '';
         $code = 0;
 
         foreach ($words as $key => $w) {
diff --git a/app/controllers/api/databases.php b/app/controllers/api/databases.php
index b3104f6736..8b44dfe720 100644
--- a/app/controllers/api/databases.php
+++ b/app/controllers/api/databases.php
@@ -3934,7 +3934,7 @@ App::get('/v1/databases/:databaseId/collections/:collectionId/usage')
                         };
                         $stats[$metric][] = [
                             'value' => 0,
-                            'date' => DateTime::formatTz(DateTime::addSeconds(new \DateTime($stats[$metric][$last]['date'] ?? null), -1 * $diff)),
+                            'date' => DateTime::formatTz(DateTime::addSeconds(new \DateTime($stats[$metric][$last]['date'] ?? 'now'), -1 * $diff)),
                         ];
                         $backfill--;
                     }
diff --git a/app/controllers/api/projects.php b/app/controllers/api/projects.php
index 4e13747a50..fe4a32dec9 100644
--- a/app/controllers/api/projects.php
+++ b/app/controllers/api/projects.php
@@ -385,7 +385,7 @@ App::get('/v1/projects/:projectId/usage')
                         };
                         $stats[$metric][] = [
                             'value' => 0,
-                            'date' => DateTime::formatTz(DateTime::addSeconds(new \DateTime($stats[$metric][$last]['date'] ?? null), -1 * $diff)),
+                            'date' => DateTime::formatTz(DateTime::addSeconds(new \DateTime($stats[$metric][$last]['date'] ?? 'now'), -1 * $diff)),
                         ];
                         $backfill--;
                     }
diff --git a/app/controllers/api/users.php b/app/controllers/api/users.php
index e090b32300..1d12d62b33 100644
--- a/app/controllers/api/users.php
+++ b/app/controllers/api/users.php
@@ -1844,7 +1844,7 @@ App::get('/v1/users/usage')
                         };
                         $stats[$metric][] = [
                             'value' => 0,
-                            'date' => DateTime::formatTz(DateTime::addSeconds(new \DateTime($stats[$metric][$last]['date'] ?? null), -1 * $diff)),
+                            'date' => DateTime::formatTz(DateTime::addSeconds(new \DateTime($stats[$metric][$last]['date'] ?? 'now'), -1 * $diff)),
                         ];
                         $backfill--;
                     }
diff --git a/src/Appwrite/Auth/Hash/Scryptmodified.php b/src/Appwrite/Auth/Hash/Scryptmodified.php
index 2d1cd4f165..7717f324e5 100644
--- a/src/Appwrite/Auth/Hash/Scryptmodified.php
+++ b/src/Appwrite/Auth/Hash/Scryptmodified.php
@@ -60,7 +60,8 @@ class Scryptmodified extends Hash
         $saltBytes = \base64_decode($options['salt']);
         $saltSeparatorBytes = \base64_decode($options['saltSeparator']);
 
-        $derivedKey = \scrypt(\utf8_encode($password), $saltBytes . $saltSeparatorBytes, 16384, 8, 1, 64);
+        $password = mb_convert_encoding($password, 'UTF-8');
+        $derivedKey = \scrypt($password, $saltBytes . $saltSeparatorBytes, 16384, 8, 1, 64);
         $derivedKey = \hex2bin($derivedKey);
 
         return $derivedKey;
diff --git a/src/Appwrite/Auth/Validator/PersonalData.php b/src/Appwrite/Auth/Validator/PersonalData.php
index 6f8ed0a8c9..f93945755c 100644
--- a/src/Appwrite/Auth/Validator/PersonalData.php
+++ b/src/Appwrite/Auth/Validator/PersonalData.php
@@ -43,10 +43,10 @@ class PersonalData extends Password
 
         if (!$this->strict) {
             $password = strtolower($password);
-            $this->userId = strtolower($this->userId);
-            $this->email = strtolower($this->email);
-            $this->name = strtolower($this->name);
-            $this->phone = strtolower($this->phone);
+            $this->userId = strtolower($this->userId ?? '');
+            $this->email = strtolower($this->email ?? '');
+            $this->name = strtolower($this->name ?? '');
+            $this->phone = strtolower($this->phone ?? '');
         }
 
         if ($this->userId && strpos($password, $this->userId) !== false) {