Ich changed the parameters of my my enpass-wifi-sync server and now i wish to reconfigure my iphone accordingly. For this, I would have to be able to
- stop Wifi-sync
- start Wifi-sync and change parameters.

However Wifi-Sync on iPhone tries and tries and tries to sync. Then it stops with an error and the only thing I can do is make it start to try again, there seems to be no change to get to the configuration screen for Wifi-sync. 

As far as I can see, it is not possible to stop Wifi-sync and reconfigure sync mode.

In the mean time I have possibly discovered a way to get to the sync configuration page: 
1. Leave the Wifi-syc process alone until - after a very long time - it stops with an error.
2. On the sync screen, the wi-fi name is displayed in the line on top of the line showing the error message: There AN ARROW APPEARS on the right-hand side: Tap on that.
3. The screen displaying the sync methods appears. BE VERY QUICK NOW and tap on the last line displaying "disconnect" in red letters: IF YOU HESITATE, 
the Wifi-syncing starts again (aargh!). 
OK upon the fith try I succeeded in tapping on "disconnect". NOW a WINDOW pops up asking me if I really want to do this. 
BUT IF TAP "YES" the screen freezes AND THE (fruitless) Wifi-Sync process starts again. 
This is surely a bug. 

So I have opened a support ticket on this case; let's see what happens.

This issue is usually related to the Local Network privacy permission on macOS and iOS. Please follow the steps below to resolve it:

On macOS:

1. Open System Settings → Privacy & Security → Local Network.

2. Locate Enpass and make sure access is enabled.

3. Stop the Wi-Fi Sync Server in Enpass and completely quit the app (Ctrl + Q).

4. Reopen Enpass and start the Wi-Fi Sync Server again.

On iOS:

1. Go to Settings → Privacy → Local Network.

2. Find Enpass and toggle access On.

3. Fully close the Enpass app and reopen it.

Once done, please try syncing again using Wi-Fi Sync and check if the issue is resolved.

It’s good that you’ve opened a ticket with the Enpass support team—they’ll surely help you with resetting the Wi-Fi Sync setup as well. You can also refer to our manual setup guide here:
https://www.enpass.io/wifi-sync-manual-setup/

Let us know if the issue persists.