If you cannot optimize your route or get an error message when trying to optimize your route, please update Circuit to the latest version.
Update here if you use Circuit on iOS (iPhone or iPad) and here if you use Circuit on Android.
After updating the app on iOS, you might need to restore your purchase.
This is how you restore your purchase:
In Circuit, Click the ☰ Menu on the left and go to "settings". Now choose "restore purchase" and log in with your Apple ID.
If you cannot click the menu, tap “View subscription options”, scroll all the way down and tap “Restore your purchase”.