diff --git a/languages/simpleshop-cz-cs_CZ.mo b/languages/simpleshop-cz-cs_CZ.mo
index 69ae044..20d3d47 100644
Binary files a/languages/simpleshop-cz-cs_CZ.mo and b/languages/simpleshop-cz-cs_CZ.mo differ
diff --git a/languages/simpleshop-cz-cs_CZ.po b/languages/simpleshop-cz-cs_CZ.po
index 883f580..7460472 100644
--- a/languages/simpleshop-cz-cs_CZ.po
+++ b/languages/simpleshop-cz-cs_CZ.po
@@ -3,14 +3,15 @@
 msgid ""
 msgstr ""
 "Project-Id-Version: SimpleShop.cz 2.0\n"
-"Report-Msgid-Bugs-To: https://wordpress.org/support/plugin/simpleshop-cz"
+"Report-Msgid-Bugs-To: https://wordpress.org/support/plugin/simpleshop-cz\n"
 "POT-Creation-Date: 2018-10-01 06:22:45+00:00\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"PO-Revision-Date: 2018-10-01 06:22:45+00:00\n"
+"PO-Revision-Date: 2021-01-28 09:53:32+01:00\n"
 "Last-Translator: Jakub Bouček <pan@jakubboucek.cz>\n"
 "Language-Team: Redbit s.r.o. <info@redbit.cz>\n"
+"Language: cs_CZ\n"
 
 #: src/Admin.php:152 src/Admin.php:154 src/Admin.php:155 src/Admin.php:161
 msgid "Member sections"
@@ -237,3 +238,9 @@ msgstr "Nastavení upraveno"
 #. Description of the plugin/theme
 msgid "Plugin implement SimpleShop.cz into Wordpress"
 msgstr "Plugin pro propojení Wordpress a SimpleShop.cz"
+
+#: src/Settings.php:392
+msgid "Error during communication with SimpleShop API, please try it later"
+msgstr "Při komunikaci se SimpleShop API došlo k chybě, prosíme zkuste to později"
+
+
diff --git a/src/Access.php b/src/Access.php
index 048825c..bc7c949 100644
--- a/src/Access.php
+++ b/src/Access.php
@@ -43,6 +43,15 @@ public function __construct( Settings $settings ) {
 	 * @return mixed
 	 */
 	public function login_redirect( $redirect, $request, $user ) {
+		if ( ! $user || is_wp_error( $user ) ) {
+			return $redirect;
+		}
+
+		if ( isset( $user->roles ) && is_array( $user->roles ) && in_array( 'administrator', $user->roles ) ) {
+			// redirect admins to the default place
+			return $redirect;
+		}
+
 		$redirect_url = $this->settings->ssc_get_option( 'ssc_redirect_url' );
 		if ( $redirect_url ) {
 			$redirect = remove_query_arg( [ 'redirect_to' ], $redirect_url );
@@ -66,6 +75,7 @@ public function check_access() {
 
 		// If the post is protected and user is not logged in, redirect him to login
 		if ( $post_groups && ! is_user_logged_in() ) {
+			nocache_headers();
 			wp_safe_redirect( wp_login_url( site_url( $_SERVER['REQUEST_URI'] ) ) );
 			exit();
 		}
@@ -76,6 +86,7 @@ public function check_access() {
 
 			$main_redirect_url = is_user_logged_in() ? site_url() : wp_login_url();
 			$url               = $no_access_url ?: $main_redirect_url;
+			nocache_headers();
 			wp_redirect( $url );
 			exit();
 		}
diff --git a/src/Admin.php b/src/Admin.php
index d8f4884..bed05c6 100644
--- a/src/Admin.php
+++ b/src/Admin.php
@@ -41,6 +41,7 @@ public function __construct( Plugin $loader ) {
 
 	/**
 	 * Get products from simple shop via API
+	 * TODO: Show message if loading pf products failed
 	 */
 	public function wp_ajax_load_simple_shop_products() {
 		$this->update_simpleshop_products_cache();
@@ -52,7 +53,6 @@ public function wp_ajax_load_simple_shop_products() {
 	 * Return products. If you need force refresh products from API, call `update_simpleshop_products_cache()` before
 	 *
 	 * @return array
-	 * @throws VyfakturujAPIException
 	 */
 	public function get_simpleshop_products() {
 		$products = $this->get_simpleshop_products_cache();
@@ -90,23 +90,24 @@ protected function get_simpleshop_products_cache() {
 
 	/**
 	 * Update Products cache from Vyfakturuj API
-	 *
-	 * @throws VyfakturujAPIException
 	 */
 	public function update_simpleshop_products_cache() {
-		$products = $this->load_simpleshop_products();
-
-		$cacheKey   = $this->loader->get_cache_user_key();
-		$cachedTime = time();
-
-		$cache = [
-			$cacheKey => array_merge(
-				$products,
-				[ self::PRODUCTS_CACHE_FIELD => $cachedTime ]
-			)
-		];
-
-		update_option( 'ssc_cache_products', $cache );
+		try {
+			$products   = $this->load_simpleshop_products();
+			$cacheKey   = $this->loader->get_cache_user_key();
+			$cachedTime = time();
+
+			$cache = [
+				$cacheKey => array_merge(
+					$products,
+					[ self::PRODUCTS_CACHE_FIELD => $cachedTime ]
+				)
+			];
+
+			return update_option( 'ssc_cache_products', $cache );
+		} catch ( VyfakturujAPIException $e ) {
+			return new \WP_Error( 'api-error', $e->getMessage() );
+		}
 	}
 
 
diff --git a/src/Settings.php b/src/Settings.php
index 3012ccc..0b05c67 100644
--- a/src/Settings.php
+++ b/src/Settings.php
@@ -9,6 +9,7 @@
 namespace Redbit\SimpleShop\WpPlugin;
 
 use Exception;
+use VyfakturujAPIException;
 
 /**
  * CMB2 Theme Options
@@ -378,11 +379,19 @@ public function settings_notices( $object_id, $updated ) {
 		}
 
 		$vyfakturuj_api = $this->loader->get_api_client( $api_email, $api_key );
-		$result         = $vyfakturuj_api->initWPPlugin( site_url() );
-		if ( isset( $result['status'] ) && $result['status'] == 'success' ) {
-			update_option( 'ssc_valid_api_keys', 1 );
-		} else {
+		try {
+			$result = $vyfakturuj_api->initWPPlugin( site_url() );
+			if ( isset( $result['status'] ) && $result['status'] == 'success' ) {
+				update_option( 'ssc_valid_api_keys', 1 );
+			} else {
+				update_option( 'ssc_valid_api_keys', 0 );
+			}
+		} catch ( VyfakturujAPIException $e ) {
 			update_option( 'ssc_valid_api_keys', 0 );
+
+			add_settings_error( $this->key . '-error', '', __( 'Error during communication with SimpleShop API, please try it later', 'simpleshop-cz' ), 'error' );
+			settings_errors( $this->key . '-error' );
+			return;
 		}