diff --git a/web-app/src/lib/completion.ts b/web-app/src/lib/completion.ts
index 68cc7183c..3834cb68f 100644
--- a/web-app/src/lib/completion.ts
+++ b/web-app/src/lib/completion.ts
@@ -187,9 +187,10 @@ export const sendCompletion = async (
   if (!secretKey) {
     throw new Error('Encryption key unavailable: cannot decrypt API key.')
   }
-  const apiKey = provider.api_key
-    ? decryptApiKey(provider.api_key, secretKey)
-    : (secretKey ?? '')
+  if (!provider.api_key) {
+    throw new Error('API key is missing for the selected provider.');
+  }
+  const apiKey = decryptApiKey(provider.api_key, secretKey);
 
   const tokenJS = new TokenJS({
     apiKey,