I have exactly the same

I also cannot play other game modes as I'm prompted to play more of the colour challenge but, as noted above, I'm unable to progress with the colour challenge. This is effectively ruining my game experience

I am at the final boss for color challenge in green and it wont load in to play.

Same , they won’t fix it , just move on , they don’t care.

I have uninstalled and reinstalled the game 2 times, now, on different networks. Using Android phone. The Color Challenge cannot be completed, as the screen will show infinitely 'Contacting Server,' and not match with a player on the 5th battle with any of the colored starter decks. No issues matching with human or bot players if tutorial/Color Challenge is skipped. Also, daily quests were cleared/reset upon uninstall, which cost progress and lost obtainable rewards.

Exact same thing here

iPad app
I’ve tried all 5 of the colors, and for each color, battle 5 causes the game to freeze. I receive an endless “Waiting for the server...” message and have to close / exit the app in order to be able to play the game again.

Color Challenge V won’t load. The screen saying it’s waiting on the server just sits there with the little icon spinning for hours until I kill the program. It’s happening on both my PC and iPad.

Bonjour,

Je viens de commencer le jeu et dès le défi couleur bleue numéro 5, la partie ne se lance pas. Toutes les autres étapes s'effectuent sans encombre mais aucun moyen de faire ce fameux défi 5. Je ne peux donc pas lancer de pvp ni avoir accès à mes récompenses.
J'espère que vous avez déjà rencontré ce problème et que vous saurez m'aiguiller face à celui-ci.
Merci. (je vous joins le screenshot)

when i try to start the 5th level of each color challenge i see a ring with "waiting for server" until I force close my client. I've tried waiting for server(20 mins), I tried all colors, i tried reinstalling the client, restarting my computer, tried replaying lvls 1-4, tried screaming, and complaining, but nothing works.

When almost completing my color challenge on green on challenges number five whenever I attempt to play that challenge it always get stuck in the waiting for the server screen so I’m unable to proceed with the rest of the game

I'm having the same issue and I just spent money on this game. Were you able to fix it?

Same problem, I can’t play the game until this is fixed it seems since you can only do bot matches or color challenges

Also occurring at least in blue. Never connects me to another player, even after letting it spin for half an hour.

Cuando llego a la última batalla en cada desafío de colores no me deja jugar se queda actualizando servidor

Besides the color I choose, the system has the same behavior:

When I click to start the color challenge's final battle, the system gets stuck in that message of "Waiting for the server".
I've waited for several minutes but with no response.

The same issue occurred in iOS and PC versions.

Impossible to finish the color battles.
4th battle is always "waiting for server"....
I've just performed the 3 firsts of each color...

I'm unable to complete any of the Color Challenges so i can unlock PVP. I'm new to this game and have been unable to progress. I get stuck on Waiting For Server. This happens on all color challenges and happens on Android/iOS/PC. Please help me get unstuck this stinks i've spent money already on this game would like to play someone !

The image of the problem is attached but since the video file of my screen recording is large, I compressed it on this drive link where the video can be either watched or downloaded safely https://jmp.sh/LimHaik

I recently transitioned from physical to online MTG play and I have begun the colour challenges. However, when I get to the last online challenge for any of the colours, the "Waiting for the server.." loading screen loads perpetually and does not stop unless I close the app. Instead I decided to override the game so I can unlock the other game modes where online play works smoothly and it's just the colour challenge that has this problem. Attached is the screen that shows up when doing the final challenge and so I do request help to find a way to fix this problem as to get the challenge out of the way and earn the cosmetics. I tried everything suggested on the "Can't connect to server" article but nothing has worked on both my Mac and my phone on different network connections.