diff --git a/app/Exceptions/Handler.php b/app/Exceptions/Handler.php
index 37e749597f..65a13edb2e 100644
--- a/app/Exceptions/Handler.php
+++ b/app/Exceptions/Handler.php
@@ -6,6 +6,7 @@ use Illuminate\Foundation\Exceptions\Handler as ExceptionHandler;
 use App\Helpers\Helper;
 use Illuminate\Validation\ValidationException;
 use Illuminate\Auth\AuthenticationException;
+use ArieTimmerman\Laravel\SCIMServer\Exceptions\SCIMException;
 use Log;
 use Throwable;
 use JsonException;
@@ -28,6 +29,7 @@ class Handler extends ExceptionHandler
         \Intervention\Image\Exception\NotSupportedException::class,
         \League\OAuth2\Server\Exception\OAuthServerException::class,
         JsonException::class,
+        SCIMException::class, //these generally don't need to be reported
     ];
 
     /**
@@ -53,7 +55,7 @@ class Handler extends ExceptionHandler
      * 
      * @param  \Illuminate\Http\Request  $request
      * @param  \Exception  $e
-     * @return \Illuminate\Http\Response
+     * @return \Illuminate\Http\JsonResponse|\Illuminate\Http\RedirectResponse|\Illuminate\Http\Response
      */
     public function render($request, Throwable $e)
     {
@@ -70,6 +72,9 @@ class Handler extends ExceptionHandler
             return response()->json(Helper::formatStandardApiResponse('error', null, 'invalid JSON'), 422);
         }
 
+        if ($e instanceof SCIMException) {
+            return response()->json(Helper::formatStandardApiResponse('error', null, 'invalid SCIM Request'), 400);
+        }
 
         // Handle Ajax requests that fail because the model doesn't exist
         if ($request->ajax() || $request->wantsJson()) {
@@ -113,8 +118,8 @@ class Handler extends ExceptionHandler
      *
      * @param  \Illuminate\Http\Request  $request
      * @param  \Illuminate\Auth\AuthenticationException  $exception
-     * @return \Illuminate\Http\Response
-     */
+     * @return \Illuminate\Http\JsonResponse|\Illuminate\Http\RedirectResponse
+  */
     protected function unauthenticated($request, AuthenticationException $exception)
     {
         if ($request->expectsJson()) {
diff --git a/app/Http/Controllers/Api/ImportController.php b/app/Http/Controllers/Api/ImportController.php
index 2426a49bed..6f5fc05ff3 100644
--- a/app/Http/Controllers/Api/ImportController.php
+++ b/app/Http/Controllers/Api/ImportController.php
@@ -126,7 +126,14 @@ class ImportController extends Controller
                 }
                 $file_name = date('Y-m-d-his').'-'.$fixed_filename;
                 $import->file_path = $file_name;
+                $import->filesize = null;
+
+                if (!file_exists($path.'/'.$file_name)) {
+                    return response()->json(Helper::formatStandardApiResponse('error', null, trans('general.file_not_found')), 500);
+                }
+
                 $import->filesize = filesize($path.'/'.$file_name);
+                
                 $import->save();
                 $results[] = $import;
             }
diff --git a/app/Http/Controllers/Api/SettingsController.php b/app/Http/Controllers/Api/SettingsController.php
index d0f7fea602..a0438ef078 100644
--- a/app/Http/Controllers/Api/SettingsController.php
+++ b/app/Http/Controllers/Api/SettingsController.php
@@ -271,7 +271,7 @@ class SettingsController extends Controller
             $headers = ['ContentType' => 'application/zip'];
             return Storage::download($path.'/'.$file, $file, $headers);
         } else {
-            return response()->json(Helper::formatStandardApiResponse('error', null, 'File not found'));
+            return response()->json(Helper::formatStandardApiResponse('error', null,  trans('general.file_not_found')));
         }
 
     }
diff --git a/app/Http/Controllers/Licenses/LicenseCheckinController.php b/app/Http/Controllers/Licenses/LicenseCheckinController.php
index a34de73d77..257722b005 100644
--- a/app/Http/Controllers/Licenses/LicenseCheckinController.php
+++ b/app/Http/Controllers/Licenses/LicenseCheckinController.php
@@ -61,7 +61,7 @@ class LicenseCheckinController extends Controller
         $license = License::find($licenseSeat->license_id);
 
         // LicenseSeat is not assigned, it can't be checked in
-        if (is_null($licenseSeat->assignedTo) && is_null($licenseSeat->asset_id)) {
+        if (is_null($licenseSeat->assigned_to) && is_null($licenseSeat->asset_id)) {
             return redirect()->route('licenses.index')->with('error', trans('admin/licenses/message.checkin.error'));
         }
 
diff --git a/app/Http/Controllers/SettingsController.php b/app/Http/Controllers/SettingsController.php
index 5498187561..1deaa5d104 100755
--- a/app/Http/Controllers/SettingsController.php
+++ b/app/Http/Controllers/SettingsController.php
@@ -65,18 +65,27 @@ class SettingsController extends Controller
             $start_settings['db_error'] = $e->getMessage();
         }
 
-        $protocol = array_key_exists('HTTPS', $_SERVER) && ('on' == $_SERVER['HTTPS']) ? 'https://' : 'http://';
+        if (array_key_exists("HTTP_X_FORWARDED_PROTO", $_SERVER)) {
+            $protocol = $_SERVER["HTTP_X_FORWARDED_PROTO"] . "://";
+        } elseif (array_key_exists('HTTPS', $_SERVER) && ('on' == $_SERVER['HTTPS'])) {
+            $protocol = "https://";
+        } else {
+            $protocol = "http://";
+        }
 
-        $host = array_key_exists('SERVER_NAME', $_SERVER) ? $_SERVER['SERVER_NAME'] : null;
-        $port = array_key_exists('SERVER_PORT', $_SERVER) ? $_SERVER['SERVER_PORT'] : null;
-        if (('http://' === $protocol && '80' != $port) || ('https://' === $protocol && '443' != $port)) {
-            $host .= ':'.$port;
+        if (array_key_exists("HTTP_X_FORWARDED_HOST", $_SERVER)) {
+            $host = $_SERVER["HTTP_X_FORWARDED_HOST"];
+        } else {
+            $host = array_key_exists('SERVER_NAME', $_SERVER) ? $_SERVER['SERVER_NAME'] : null;
+            $port = array_key_exists('SERVER_PORT', $_SERVER) ? $_SERVER['SERVER_PORT'] : null;
+            if (('http://' === $protocol && '80' != $port) || ('https://' === $protocol && '443' != $port)) {
+                $host .= ':'.$port;
+            }
         }
         $pageURL = $protocol.$host.$_SERVER['REQUEST_URI'];
 
-        $start_settings['url_valid'] = (url('/').'/setup' === $pageURL);
-
-        $start_settings['url_config'] = url('/');
+        $start_settings['url_config'] = url('/').'/setup';
+        $start_settings['url_valid'] = ($start_settings['url_config'] === $pageURL);
         $start_settings['real_url'] = $pageURL;
         $start_settings['php_version_min'] = true;
 
diff --git a/app/Models/Depreciation.php b/app/Models/Depreciation.php
index 39fb935494..9faa1b86e2 100755
--- a/app/Models/Depreciation.php
+++ b/app/Models/Depreciation.php
@@ -16,7 +16,7 @@ class Depreciation extends SnipeModel
     // Declare the rules for the form validation
     protected $rules = [
         'name' => 'required|min:3|max:255|unique:depreciations,name',
-        'months' => 'required|max:3600|integer',
+        'months' => 'required|max:3600|integer|gt:0',
     ];
 
     /**
diff --git a/config/logging.php b/config/logging.php
index 94495a2a33..65b717750d 100644
--- a/config/logging.php
+++ b/config/logging.php
@@ -117,6 +117,11 @@ $config = [
                     \Log::info("IGNORING E_WARNING in production mode: ".$args->getMessage());
                     return true; // "TRUE - you should ignore it!"
                 }
+                $needle = "ArieTimmerman\\Laravel\\SCIMServer\\Exceptions\\SCIMException";
+                if (App::environment('production') && is_string($args) && strncmp($args, $needle, strlen($needle) ) === 0 ) {
+                    \Log::info("String: '$args' looks like a SCIM Exception; ignoring error");
+                    return true; //yes, *do* ignore it
+                }
                 return false;
             },
         ],
diff --git a/database/factories/ActionlogFactory.php b/database/factories/ActionlogFactory.php
index 33cc83ead4..382a6412c2 100644
--- a/database/factories/ActionlogFactory.php
+++ b/database/factories/ActionlogFactory.php
@@ -55,7 +55,7 @@ class ActionlogFactory extends Factory
                     [
                         'assigned_to' => $target->id,
                         'assigned_type' => \App\Models\User::class,
-                        'assigned_to' => $target->location_id,
+                        'location_id' => $target->location_id,
                     ]
                 );
     
@@ -84,7 +84,7 @@ class ActionlogFactory extends Factory
                     [
                         'assigned_to' => $target->id,
                         'assigned_type' => \App\Models\Location::class,
-                        'assigned_to' => $target->id,
+                        'location_id' => $target->id,
                     ]
                 );
 
diff --git a/resources/lang/de/general.php b/resources/lang/de/general.php
index 08412e2e27..3f9634b60b 100644
--- a/resources/lang/de/general.php
+++ b/resources/lang/de/general.php
@@ -395,7 +395,7 @@ return [
     'end_date'            => 'Enddatum',
     'alt_uploaded_image_thumbnail' => 'Hochgeladene Miniaturansicht',
     'placeholder_kit'       => 'Kit auswählen',
-    'file_not_found'        => 'File not found',
+    'file_not_found'        => 'File not found on server',
     'preview_not_available' => '(no preview)',
     'setup'                 => 'Setup',
     'pre_flight'            => 'Pre-Flight',
diff --git a/resources/views/groups/index.blade.php b/resources/views/groups/index.blade.php
index ffc193c7cf..4958e3a4d0 100755
--- a/resources/views/groups/index.blade.php
+++ b/resources/views/groups/index.blade.php
@@ -41,7 +41,7 @@
 
             <thead>
               <tr>
-               <th data-switchable="true" data-sortable="false" data-field="id" data-visible="false">{{ trans('general.id') }}</th>
+               <th data-switchable="true" data-sortable="true" data-field="id" data-visible="false">{{ trans('general.id') }}</th>
                <th data-switchable="true" data-sortable="true" data-field="name" data-formatter="groupsAdminLinkFormatter" data-visible="true">{{ trans('admin/groups/table.name') }}</th>
                <th data-switchable="true" data-sortable="true" data-field="users_count" data-visible="true">{{ trans('admin/groups/table.users') }}</th>
                <th data-switchable="true" data-sortable="true" data-field="created_at" data-visible="true" data-formatter="dateDisplayFormatter">{{ trans('general.created_at') }}</th>