diff --git a/assets/js/plugin-check-admin.js b/assets/js/plugin-check-admin.js
index 22227cc4e..f35c0cd16 100644
--- a/assets/js/plugin-check-admin.js
+++ b/assets/js/plugin-check-admin.js
@@ -5,6 +5,7 @@
 		'plugin-check__export-controls'
 	);
 	const spinner = document.getElementById( 'plugin-check__spinner' );
+	const clientError = document.getElementById( 'plugin-check__client-error' );
 	const pluginsList = document.getElementById(
 		'plugin-check__plugins-dropdown'
 	);
@@ -21,6 +22,7 @@
 		! resultsContainer ||
 		! exportContainer ||
 		! spinner ||
+		! clientError ||
 		! categoriesList.length ||
 		! typesList.length
 	) {
@@ -83,6 +85,9 @@
 		checkItButton.disabled = true;
 		pluginsList.disabled = true;
 		spinner.classList.add( 'is-active' );
+		clientError.innerText = '';
+		clientError.classList.add( 'is-hidden' );
+
 		for ( let i = 0; i < categoriesList.length; i++ ) {
 			categoriesList[ i ].disabled = true;
 		}
@@ -106,6 +111,10 @@
 				resetForm();
 			} )
 			.catch( ( error ) => {
+				clientError.innerText = error.message;
+				clientError.classList.remove( 'is-hidden' );
+				clientError.focus();
+
 				console.error( error );
 
 				resetForm();
diff --git a/includes/Admin/Admin_Page.php b/includes/Admin/Admin_Page.php
index 5dd4881e8..ff8826b22 100644
--- a/includes/Admin/Admin_Page.php
+++ b/includes/Admin/Admin_Page.php
@@ -434,6 +434,10 @@ public function admin_footer() {
 			.plugin-check__export-controls.is-hidden {
 				display: none;
 			}
+			/** Plugin Check Client Errors **/
+			#plugin-check__client-error.is-hidden {
+				display: none;
+			}
 		</style>
 		<?php
 	}
diff --git a/templates/admin-page.php b/templates/admin-page.php
index d8bfe935e..b45a2a1c2 100644
--- a/templates/admin-page.php
+++ b/templates/admin-page.php
@@ -39,6 +39,7 @@
 
 				<input type="submit" value="<?php esc_attr_e( 'Check it!', 'plugin-check' ); ?>" id="plugin-check__submit" class="button button-primary" />
 				<span id="plugin-check__spinner" class="spinner" style="float: none;"></span>
+				<div class="notice notice-error is-hidden" role="alert" tabindex="-1" id="plugin-check__client-error"></div>
 				<div class="plugin-check__options">
 					<div>
 						<h4><?php esc_attr_e( 'Categories', 'plugin-check' ); ?></h4>