Guys! 
HAVE A SOLUTION!
Well. Maybe not a "solution" but a HALF solution.
To be frankly I was quite pissed off for this situation...
Could't sleep 
Last season I used App on my previous Xiaomi Mi9 (android)
No problems at all.
On my new Xiaomi Mi11 (android) when I used app in this season - problems
I put my sim card to my old phone and... Problems...
I have installed app on my wife's Huawei P30 - also problems!
I have installed app on my daughter's iPhone11 - and it works! No errors!
Strange...
More strange was when I connected my Mi11 to home wifi and...
App works with no errors on both Xiaomi's and Huawei.
So problem is ONLY when I use a mobile internet.
My Xiaomi an wife's Huawei - we have a T-Mobile operator.
My daughter has an Orange as a provider.
Well. So T-Mobile has become a suspect one
All our home laptops/PC - we use a Nord VPN for a security.
So I have downloaded Nord VPN on my phone.
And... Navigation on mobile internet on my Xioami Mi11 when VPN is ON works without any problems!
And of course I have made a phone call to T-Mobile and explained them what problem is.
They said a T-Mobile "take care" for a users safety and all "suspicious' servers is blocked by T-Mobile.
????WTF???
I am quite sure that a MRA Nav do not use a "suspicious" servers.. I hope 
Guys.
Anyone of you maybe using MRA Nav on T-Mobile in other countries?
Have such a problems like me?
Finally...
I have a fully operated app back
All I have to do is run a VPN before I start using it...
Thanks a lot for support and help
@Spili
Luckily you found it.
Yes, providers also do all kinds of things to improve / secure their software, but often do not take into account what we as users have running on the smartfone for app.
@Spili hmmmm your researched yielded some very interesting results.
Surprisingly I have found to have no problems at all on T-Mobile network... I have two sim cards in my phone and switching between both of them (T-Mobile and Vodafone) does not seem to yield different MRA Navigation behaviour. Hmmm. Maybe it's country related?
At least you've found a "decent" solution! 
Happy driving up ahead!
@Spili hmmmm your researched yielded some very interesting results.
Surprisingly I have found to have no problems at all on T-Mobile network... I have two sim cards in my phone and switching between both of them (T-Mobile and Vodafone) does not seem to yield different MRA Navigation behaviour. Hmmm. Maybe it's country related?
At least you've found a "decent" solution! Happy driving up ahead!
