diff --git a/Core/Frameworks/Baikal/WWWRoot/index.php b/Core/Frameworks/Baikal/WWWRoot/index.php
index 092a21c..d70abc6 100644
--- a/Core/Frameworks/Baikal/WWWRoot/index.php
+++ b/Core/Frameworks/Baikal/WWWRoot/index.php
@@ -40,7 +40,7 @@ if (file_exists(getcwd() . "/Core")) {
 }
 
 if (!file_exists(PROJECT_PATH_ROOT . 'vendor/')) {
-    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. Please, execute "<strong>composer install</strong>" in the folder where you installed Ba&iuml;kal.');
+    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. If you are a regular user, this means that you probably downloaded the wrong zip file.</p><p>To install the dependencies manually, execute "<strong>composer install</strong>" in the Ba&iuml;kal root folder.</p>');
 }
 
 require PROJECT_PATH_ROOT . 'vendor/autoload.php';
diff --git a/Core/Frameworks/BaikalAdmin/WWWRoot/index.php b/Core/Frameworks/BaikalAdmin/WWWRoot/index.php
index db5676f..32bdfaa 100644
--- a/Core/Frameworks/BaikalAdmin/WWWRoot/index.php
+++ b/Core/Frameworks/BaikalAdmin/WWWRoot/index.php
@@ -41,7 +41,7 @@ if (file_exists(dirname(getcwd()) . "/Core")) {
 }
 
 if (!file_exists(PROJECT_PATH_ROOT . 'vendor/')) {
-    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. Please, execute "<strong>composer install</strong>" in the folder where you installed Ba&iuml;kal.');
+    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. If you are a regular user, this means that you probably downloaded the wrong zip file.</p><p>To install the dependencies manually, execute "<strong>composer install</strong>" in the Ba&iuml;kal root folder.</p>');
 }
 
 require PROJECT_PATH_ROOT . 'vendor/autoload.php';
diff --git a/Core/Frameworks/BaikalAdmin/WWWRoot/install/index.php b/Core/Frameworks/BaikalAdmin/WWWRoot/install/index.php
index 371b48c..547214f 100644
--- a/Core/Frameworks/BaikalAdmin/WWWRoot/install/index.php
+++ b/Core/Frameworks/BaikalAdmin/WWWRoot/install/index.php
@@ -46,7 +46,7 @@ if (file_exists(dirname(dirname(getcwd())) . "/Core")) {
 }
 
 if (!file_exists(PROJECT_PATH_ROOT . 'vendor/')) {
-    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. Please, execute "<strong>composer install</strong>" in the folder where you installed Ba&iuml;kal.');
+    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. If you are a regular user, this means that you probably downloaded the wrong zip file.</p><p>To install the dependencies manually, execute "<strong>composer install</strong>" in the Ba&iuml;kal root folder.</p>');
 }
 
 require PROJECT_PATH_ROOT . "vendor/autoload.php";
diff --git a/html/cal.php b/html/cal.php
index 0992bff..7242048 100644
--- a/html/cal.php
+++ b/html/cal.php
@@ -40,7 +40,7 @@ if (file_exists(getcwd() . "/Core")) {
 }
 
 if (!file_exists(PROJECT_PATH_ROOT . 'vendor/')) {
-    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. Please, execute "<strong>composer install</strong>" in the folder where you installed Ba&iuml;kal.');
+    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. If you are a regular user, this means that you probably downloaded the wrong zip file.</p><p>To install the dependencies manually, execute "<strong>composer install</strong>" in the Ba&iuml;kal root folder.</p>');
 }
 
 require PROJECT_PATH_ROOT . 'vendor/autoload.php';
diff --git a/html/card.php b/html/card.php
index 5501ca1..1ee24a0 100644
--- a/html/card.php
+++ b/html/card.php
@@ -40,7 +40,7 @@ if (file_exists(getcwd() . "/Core")) {
 }
 
 if (!file_exists(PROJECT_PATH_ROOT . 'vendor/')) {
-    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. Please, execute "<strong>composer install</strong>" in the folder where you installed Ba&iuml;kal.');
+    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. If you are a regular user, this means that you probably downloaded the wrong zip file.</p><p>To install the dependencies manually, execute "<strong>composer install</strong>" in the Ba&iuml;kal root folder.</p>');
 }
 
 require PROJECT_PATH_ROOT . 'vendor/autoload.php';
diff --git a/html/dav.php b/html/dav.php
index 12429e5..d068b54 100644
--- a/html/dav.php
+++ b/html/dav.php
@@ -40,7 +40,7 @@ if (file_exists(getcwd() . "/Core")) {
 }
 
 if (!file_exists(PROJECT_PATH_ROOT . 'vendor/')) {
-    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. Please, execute "<strong>composer install</strong>" in the folder where you installed Ba&iuml;kal.');
+    die('<h1>Incomplete installation</h1><p>Ba&iuml;kal dependencies have not been installed. If you are a regular user, this means that you probably downloaded the wrong zip file.</p><p>To install the dependencies manually, execute "<strong>composer install</strong>" in the Ba&iuml;kal root folder.</p>');
 }
 require PROJECT_PATH_ROOT . 'vendor/autoload.php';