Why Huawei calendars sometimes don't show constellations?

Huawei calendars sometimes don't show constellations. The solution steps are as follows:

1. After turning on the phone, click Huawei Calendar Software.

2. After entering the page, click the three-point symbol above.

3. In the options that appear, click Subscription Management.

4. In the interface that appears, click Constellation Subscription.

5. Select the constellation, and then click OK.