iOS 12.5.5: app shows blank screen in Modern UI

[ildar170975]

Describe the bug
On 07.08.22 the Traccar Manager on iOS was switched to Modern UI.
I usually used Old UI since I dislike Modern UI and also the App seemed to not work properly in Modern UI.
But on that date the App was forcibly switched to Modern UI.

Then the App's screen became blank & did not react on any taps.
I reinstalled the App, logged in.
Then see this:

If I press the green button on the left - I see a list of devices.
Assume I selected some device.
End.
I see a blank screen.

If I unload the App (swipe up from a bottom), then I see a login screen again.
Then the same scenario is repeated.

Smartphone:

• Device: iPhone 5S
• OS:12.5.5

[tananaev]

Are you using demo servers? Which one an what's the email address?

[ildar170975]

Sorry for not mentioning it.
I am using demo3.
My account is [redacted], using to monitor family members.

[tananaev]

I'm not able to reproduce on a newer iOS versions. Do you get the same issue in the browser? Please check developer console for error messages.

[ildar170975]

It happens in Application only.
Probably this is about an iOS version.
The old UI worked OK.

[tananaev]

It doesn't happen in Safari on the same phone?

[ildar170975]

Good point.
Safari:

1. After login I see the same screen as provided above.
2. Press on the green button on the left.
3. A list of devices is displayed.
4. Select a device.
5. A small popup is displayed immediately:
   
6. But a map is not displayed.
7. Pressing a "Left" button causes a return to the initial screen. No map is displayed.

[tananaev]

So the same issue?

[ildar170975]

A similar issue:

1. Application:

• blank screen after selecting a device;
• app does not react on taps.

2. Safari:

• a screen with bottom buttons, green button w/o a map after selecting a device;
• you still can press buttons.

[tananaev]

Are you sure you didn't change anything in the preferences in the app?

[ildar170975]

Did not change anything.
The App just suddenly stopped working.
Usually I am using website to monitor my family.
As soon as I realized that it changed to the Modern UI, I opened the App on iPhone and realized that it doesn't work.
At least 1..2 days before it worked, did not change anything.

Also, I reinstalled it at least 2 times - to see if it fixes a bug.
Probably after installation it should reset its settings.

When playing with a Safari, I entered Settings and changed this:

Just in case to see if it shows a map.

[tananaev]

So can you check developer console in Safari?

[ildar170975]

For this I will need a real Mac PC or a virtual Mac on VmWare.
Will try with VmWare then...

[YeiserGS]

any solution i have the same problem.

[ildar170975]

Do not have a solution.
I was advised to check an iPhone remotely from Mac (Code Inspector), but it the Code Inspector hangs while trying to connect to iPhone.
There is something in iOS incompatible with Modern UI.