Fix legacy prefix bug

web/app/install/installForm.tsx

@@ -80,12 +80,12 @@ const InstallForm = () => {
     fetchSetupStatus().then((res: SetupStatusResponse) => {
       if (res.step === 'finished') {
         localStorage.setItem('setup_status', 'finished')
-        router.push(`/signin`)
+        router.push('/signin')
       }
       else {
         fetchInitValidateStatus().then((res: InitValidateStatusResponse) => {
           if (res.status === 'not_started')
-            router.push(`/init`)
+            router.push('/init')
         })
       }
       setLoading(false)