diff --git a/GameEngine/Automation.php b/GameEngine/Automation.php
index c7c0903a..679ae102 100755
--- a/GameEngine/Automation.php
+++ b/GameEngine/Automation.php
@@ -4733,7 +4733,7 @@ $wallimg = "<img src=\"".GP_LOCATE."img/g/g3".$targettribe."Icon.gif\" height=\"
     		foreach($array as $oasis) {
     		    $ids[] = $oasis['wref'];
     		}
-    		
+
     		$database->regenerateOasisUnits($ids, true);
 		}
 	}
@@ -5306,37 +5306,39 @@ $wallimg = "<img src=\"".GP_LOCATE."img/g/g3".$targettribe."Icon.gif\" height=\"
 		$time = time();
 		$q = "SELECT * FROM " . TB_PREFIX . "artefacts where type = 8 and active = 1 and lastupdate <= ".($time - 86400);
 		$array = $database->query_return($q);
-		foreach($array as $artefact) {
-		$kind = rand(1,7);
-		while($kind == 6){
-		$kind = rand(1,7);
-		}
-		if($artefact['size'] != 3){
-		$bad_effect = rand(0,1);
-		}else{
-		$bad_effect = 0;
-		}
-		switch($kind) {
-				case 1:
-				$effect = rand(1,5);
-				break;
-				case 2:
-				$effect = rand(1,3);
-				break;
-				case 3:
-				$effect = rand(3,10);
-				break;
-				case 4:
-				$effect = rand(2,4);
-				break;
-				case 5:
-				$effect = rand(2,4);
-				break;
-				case 7:
-				$effect = rand(1,6);
-				break;
-			}
-			mysqli_query($GLOBALS['link'],"UPDATE ".TB_PREFIX."artefacts SET kind = ". (int) $kind. ", bad_effect = $bad_effect, effect2 = $effect, lastupdate = $time WHERE id = ".(int) $artefact['id']);
+		if ($array) {
+    		foreach($array as $artefact) {
+    		$kind = rand(1,7);
+    		while($kind == 6){
+    		$kind = rand(1,7);
+    		}
+    		if($artefact['size'] != 3){
+    		$bad_effect = rand(0,1);
+    		}else{
+    		$bad_effect = 0;
+    		}
+    		switch($kind) {
+    				case 1:
+    				$effect = rand(1,5);
+    				break;
+    				case 2:
+    				$effect = rand(1,3);
+    				break;
+    				case 3:
+    				$effect = rand(3,10);
+    				break;
+    				case 4:
+    				$effect = rand(2,4);
+    				break;
+    				case 5:
+    				$effect = rand(2,4);
+    				break;
+    				case 7:
+    				$effect = rand(1,6);
+    				break;
+    			}
+    			mysqli_query($GLOBALS['link'],"UPDATE ".TB_PREFIX."artefacts SET kind = ". (int) $kind. ", bad_effect = $bad_effect, effect2 = $effect, lastupdate = $time WHERE id = ".(int) $artefact['id']);
+    		}
 		}
 	}
 }
diff --git a/GameEngine/Database.php b/GameEngine/Database.php
index 8e6dc795..9ede26f3 100755
--- a/GameEngine/Database.php
+++ b/GameEngine/Database.php
@@ -908,7 +908,7 @@ class MYSQLi_DB implements IDbConnection {
 	    global $autoprefix;
 
 	    if (is_array($wid)) {
-	        $wid = implode(',', $wid);
+	        $wid = '"'.implode(',', $wid).'"';
 	    } else {
 	        $wid = (int) $wid;
 	    }
@@ -918,10 +918,14 @@ class MYSQLi_DB implements IDbConnection {
 	    $str = file_get_contents($autoprefix."var/db/datagen-oasis-troops-regen.sql");
 	    $str = preg_replace(["'%PREFIX%'", "'%VILLAGEID%'", "'%NATURE_REG_TIME%'"], [TB_PREFIX, $wid, ($automation ? NATURE_REGTIME : -1)], $str);
 	    $result = $this->dblink->multi_query($str);
+
+	    // fetch results of the multi-query in order to allow subsequent query() and multi_query() calls to work
+	    while (mysqli_more_results($this->dblink) && mysqli_next_result($this->dblink)) {;}
+
 	    if (!$result) {
 	        return false;
 	    }
-	    
+
 	    return true;
 	}
 
@@ -3885,8 +3889,11 @@ class MYSQLi_DB implements IDbConnection {
             $str = file_get_contents($autoprefix."var/db/struct.sql");
             $str = preg_replace("'%PREFIX%'", TB_PREFIX, $str);
             $result = $this->dblink->multi_query($str);
+            
+            // fetch results of the multi-query in order to allow subsequent query() and multi_query() calls to work
+            while (mysqli_more_results($this->dblink) && mysqli_next_result($this->dblink)) {;}
+
             if (!$result) {
-                echo mysqli_error($this->dblink); exit;
                 return false;
             }
         } catch (\Exception $e) {
@@ -3921,14 +3928,12 @@ class MYSQLi_DB implements IDbConnection {
             $str = file_get_contents($autoprefix."var/db/datagen-world-data.sql");
             $str = preg_replace(["'%PREFIX%'", "'%WORLDSIZE%'"], [TB_PREFIX, WORLD_MAX], $str);
             $result = $this->dblink->multi_query($str);
+            
+            // fetch results of the multi-query in order to allow subsequent query() and multi_query() calls to work
+            while (mysqli_more_results($this->dblink) && mysqli_next_result($this->dblink)) {;}
+            
             if (!$result) {
                 return -1;
-            } else {
-                // we need to flush the result of our previous multi_query
-                // or the next multi_query in regenerateOasisUnits() will cause
-                // a "Commands out of sync; you can't run this command now" error
-                // more info: https://stackoverflow.com/a/27926561/467164
-                while (mysqli_next_result($this->dblink)) {;}
             }
             
             $result = $this->regenerateOasisUnits(-1);
diff --git a/login.php b/login.php
index fd094e33..8f65027f 100644
--- a/login.php
+++ b/login.php
@@ -10,6 +10,10 @@
 ##                                                                             ##
 #################################################################################
 
+if(!file_exists('var/installed')) {
+    header("Location: install/");
+    exit;
+}
 
 error_reporting(E_ALL);
 include("GameEngine/Account.php");