Fix register page 500

src/bin/build-keycloak-theme/generateFtl/register.ftl

@@ -41,6 +41,6 @@
         return false;
 
     })(),
-    "recaptchaSiteKey": "${recaptchaSiteKey}"
+    "recaptchaSiteKey": "${recaptchaSiteKey!''}" || undefined
 }
 </script>

src/lib/kcContext.ts

@@ -113,7 +113,8 @@ export declare namespace KcContext {
         };
         passwordRequired: boolean;
         recaptchaRequired: boolean;
-        recaptchaSiteKey: string;
+        /** undefined if !recaptchaRequired */
+        recaptchaSiteKey?: string;
     };
 
 }