diff --git a/web/service/base.ts b/web/service/base.ts
index 8ffacaa0f..808189983 100644
--- a/web/service/base.ts
+++ b/web/service/base.ts
@@ -115,7 +115,7 @@ function requiredWebSSOLogin(message?: string, code?: number) {
     params.append('message', message)
   if (code)
     params.append('code', String(code))
-  globalThis.location.href = `/webapp-signin?${params.toString()}`
+  globalThis.location.href = `${globalThis.location.origin}${basePath}/webapp-signin?${params.toString()}`
 }
 
 export function format(text: string) {