diff --git a/web/source/keyboards/kmwkeyboards.ts b/web/source/keyboards/kmwkeyboards.ts
index 17b2b18091..3fa42de125 100644
--- a/web/source/keyboards/kmwkeyboards.ts
+++ b/web/source/keyboards/kmwkeyboards.ts
@@ -484,7 +484,7 @@ namespace com.keyman.keyboards {
         //
         // In case p's rejection is never caught, throwing this error will generate logs that shows up
         // in Sentry or in the console, with useful information for debugging either way.
-        throw new Error("Unable to load keyboard with internal name \"" + PInternalName + "\", language code \"" + PLgCode + "\".");
+        throw new Error("Unable to load keyboard with internal name \"" + PInternalName + "\", language code \"" + PLgCode + "\": "+JSON.stringify(error));
       });
 
       return p;