Squad building challenges connection error

[Fallen-kostyan]

Product: FIFA 19
Platform:Nintendo Switch
What is your gamertag/PSN ID? Vozimer
Which mode has this happened in? FIFA Ultimate Team
Which part of the mode? Squad Building Challenges
Can you tell us the date (MM/DD/YYYY) that you saw the bug? 09.13.2019 - 09.16.2019
What time did you see the bug? (HH:MM AM/PM) Anytime
What is your time zone? EAT - GMT + 3:00
How often does the bug occur? Every time (100%)
Steps: How can we find the bug ourselves? I go to Marquee Matchups - Kashima v F.C. Tokyo. Build squad. Press Submit squad. Here is there the error appears.
What happens when the bug occurs? Messege: "We are sorry but there has been an error connecting to FIFA 19 Ultimate Team. You will be returned to the FIFA 19 Main Menu."
What should be happening instead? Challenge must be complited

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I can't finish the last Marquee Matchup squad building challenge on my Nintendo Switch.
Everytime I press "Submit squad"  I get message:
"We are sorry but there has been an error connecting to FIFA 19 Ultimate Team. You will be returned to the FIFA 19 Main Menu."
I tried to delete squad and build it with other players - it didn't help. I tried other inthernet connection - it also didn't help. It'll be very sad to loose the award.