I've been having this problem for a while too. I tried all the things, deleting the files manually, using the unintstall built in, Kazzigs thing. Installing it on epic games instead, but none of it has worked. I know it's not my internet too since this isn't happening for my brother or his account and we have computers that are basically copies of each other, same windows 10, same processor, pcu, ram etc

I've got the same problem. I've tried kazzig's solution but sadly it doesn't work on my computer.

Has anyone found a solution to this for iOS? I've tried restarting phone, uninstalling the app and redownloading, nothing works.

Hey folks, glad to see my solution reached at least some of you. No need for any medals, that's what the Magic players' community is here for!

kazzig#14858 thank you very much, it worked in windows 10, not the same path as you said, but the base of the problem is there. i've done what you said, restarted the windows, and the game is updating (8.10GB)
Someone give a statue to this man, i'm at 6 days with this problem and now is working (updating) :-)

kazzig#14858 the hero we needed. thank you so much! Is there an option to honor someone for wizards to reward them?

What version of Windows you all got? Is there someone with Windows 8.1 who can play MTG Arena?
Maybe Wizards put a curse on old systems, they seem to be globalist artifact technocrats!

Thanks kazzig#14858, but didn't work for me. Thunaer#55240 what version of Windows you're running? I got Windows 8.1
Is there people with Windows 8.1 who can play MTG Arena? Maybe Wizards put a spell on Windows 8.1
and I just can't counter it. I put a curse on you Wizards if you did that! You made me a black sorcerer now, used to white blue. Maybe I have to sacrifice my old computer and a summon big creature to eat all Wizards of the Coast!

@kazzig#14858 It works! Thank you very much!

Game gets stuck on "Error Updating Data" screen. Re-installing didn't fix it. Bug appears on all platforms available to me.

Edit: Was able to play briefly but now bug is appearing again with no change in setup

As said earlier in this thread:
Same issue on PC (from the Jan 26th patch/update?)!

Ok guys, you need to be very tough, but I got it working - HOLY ****.
If you are on Windows 11 and stuck at the initial screen with "error updating data - please check your connection and try again" then stick to my words now (translation might not be 100% correct, I am running the German Windows 11 version):

1. Go to Settings
2. Time and Language
3. Language and Region
4. Administrative Settings (This option is a bit further down)
5. Language for Unicode-incompatible programs / apps
6. Check mark after opening the region settings "Beta: Use Unicode UTF-8 for worldwide language support."
7. Restart your system and smile forever :)

Same problem with Epic, Steam and MTG Launcher. Nothing works :(

Wondering if WotC even reads these comments. Always when trying to install the game the installing process ends in asset manifest step, error updating data. The problem seems to be between installing software and mtga servers.

In UTC_Log it says this:

[2] FD Lookup failed: Partial byte sequence encountered in the input.
Parameter name: string
[2] Using fallback FD
[81] [TaskLogger][Accounts - Startup] Player has rememberMe ID (refresh token) saved. Attempting fast login.
[81] [TaskLogger][Accounts - Startup] Fast login error: -1 |
Sending player back to Login screen.
[86] [AssetBundles] GET manifest pointer from https://assets.mtgarena.wizards.com/External_2024.33.70.5061.1049592-windows.mtga ...
[87] [TaskLogger]Unexpected HTTP response when fetching manifest pointer file from https://assets.mtgarena.wizards.com/External_2024.33.70.5061.1049592-windows.mtga: (-1)
[88] ArgumentNullException: Value cannot be null.

PC version only

Same issue, can't play the game anymore and nothing seems to work.

HELLO, we need all a Solution!!!

I have the same problem here!

also getting Error Updating Data - Please check your connection and try again - 2024.33.70.5061 patch, started 01/26

I have also had this issue for a few days now. I have tried rebooting, restarting and reinstalling the client to no avail. My internet connection is working fine. I am able to play via my iPad however my PC version will not load.