Hi! I understand that after selecting the parking time in the ZKB TWINT app, you're not seeing the option to pay or book the parking. Let's see if we can get this sorted out together.

To help me understand better:
- Are you able to proceed normally with other payment functions in the app, or is it only the parking payment that's missing?
- Have you recently updated the app, or have you used this parking feature successfully before on the same device?
- Does the app show any error messages or does the payment option simply not show up after time selection?

Meanwhile, here are some initial basic steps you can try:

1. Restart the app: Close TWINT completely (remove it from recent apps) and reopen it.
2. Check for app updates: Make sure you have the latest version installed from the Microsoft Store or official site.
3. Check internet connection: Ensure your Windows device has a stable internet connection since payment options require online access.
4. Try restarting your device: This can clear temporary glitches.

If none of these help, a likely cause could be a temporary app glitch or restrictions on parking sessions (like existing active session or account limitations). For instance, TWINT does not allow extending or starting multiple parking sessions in some cases without ending previous sessions first1.

Could you also check your transaction overview in the app to see if there is an active parking session that you might need to end before starting a new one? You can do this by selecting the payment in the transaction overview and tapping “Show details,” then “End parking session” if applicable2.

Please let me know about the details I asked, and we’ll continue from there! Are you satisfied with the initial steps so far?