Hello Malldannoun8
To help resolve this issue, try removing the app from the Dock and restart the Apple Watch. To remove the app from the Dock, press the side button, then turn the Digital Crown until you get to the app you want to remove. Swipe left on the app, then tap X. This step is shown under the section of this article that states "Choose which apps appear in the Dock": Open apps on Apple Watch - Apple Support
Next, Restart your Apple Watch :
How to restart your Apple Watch if you have watchOS 9
1. If your Apple Watch is charging, take it off the charger.
2. Press and hold the side button until you see the power button
in the upper-right corner of the display.
3. Tap the power button.
4. Drag the Power Off slider.
5. After your watch turns off, press and hold the side button again until you see the Apple logo.

How to restart your Apple Watch if you have watchOS 8 or earlier
1. If your Apple Watch is charging, take it off the charger.
2. Press and hold the side button until you see the Power Off slider.
3. Drag the Power Off slider.
4. After your watch turns off, press and hold the side button again until you see the Apple logo.
Thanks for using the Apple Support Communities, and have a great day!