When a search engine is enabled, if I type in the address bar a single word then the page loads as https://thatword/. However if I type multiple words it works as expected.

If I put in the following dbgln's

diff --git a/Ladybird/Qt/LocationEdit.cpp b/Ladybird/Qt/LocationEdit.cpp
index 7dc4336331..3a23be952c 100644
--- a/Ladybird/Qt/LocationEdit.cpp
+++ b/Ladybird/Qt/LocationEdit.cpp
@@ -38,6 +38,8 @@ LocationEdit::LocationEdit(QWidget* parent)
             search_engine_url = Settings::the()->search_engine().query_url;

         auto query = ak_string_from_qstring(text());
+        dbgln("query={}, engine_url={}", query, search_engine_url);
+        dbgln("sanitized_url={}", WebView::sanitize_url(query, search_engine_url));

         if (auto url = WebView::sanitize_url(query, search_engine_url); url.has_value())
             setText(qstring_from_ak_string(url->serialize()));

The I get the following in the logs:

294966.228 Ladybird(680721): query=a, engine_url=https://duckduckgo.com/?q={}
294966.228 Ladybird(680721): sanitized_url=https://a/
294966.280 RequestServer(680723:680748): ConnectionCache: Connection to https://a/ failed: Temporary failure in name resolution
294966.280 RequestServer(680723:680748): Request with a null socket finished for URL https://a/
294966.280 WebContent(680757): ResourceLoader: Failed load of: "https://a/", Error: Load failed, Duration: 45ms
294973.648 Ladybird(680721): query=a a, engine_url=https://duckduckgo.com/?q={}
294973.648 Ladybird(680721): sanitized_url=https://duckduckgo.com/?q=a%20a

So the issue is likely in WebView::sanitize_url