It looks like you were trying to open an universal link. These links are intended to directly access content inside the app. You will need to open such links on a device where the app is installed as described below.
iPhone and iPad
When a Universal Link is opened, iOS checks to see if any installed app is registered for that domain. The system also remembers your preference to either open them in the app or on the web. You might need to manually reset your choice, afterwards they should automatically launch the app.
- Verify that the app is installed on your device
- Long press on the link and choose Open in Yomu
Mac
Universal Links on Mac always launch your browser by default. You will need to each time explicitly open them in the app instead.
- Verify that the app is installed on your device
- Right click on the link and choose Open With > Yomu.app