Same here buddy! I stopped playing Arena for some months and now that I came back can't play the game because of this. So annoying!

The last challenge on any of the color quest will no get past waiting on the server. Will not let me complete the quest to unlock pvp

I am also experiencing this same bug.

Every time I try and complete the 5th battle on the color challenge the match will not start. The screen goes dark and it says waiting for server and I have let it load for upwards of 20 minutes and it never loads in. I am on IOS and I have tried logging out re downloading the app and nothing seems to work. I cannot play any other game modes till I finish the color challenge and I can’t even start the match. I have completed the first 4 battles for each color but the 5th battle will not load for any of the colors.

Same issue here! Not a great start...

I'm try both: pc and android. Same issue.
I was trying reinstall game, "netsh winsock reset" and change dns to public one without success.

Same happens on PC

On an android device each of the colour challenges I complete the first four challenges but when trying to complete the final dual the game sits on waiting for server for an indefinite time rather than continuing to allow me to complete the challenge.

I’ve been trying to complete the color challenge. When playing against the AI colors everything starts up properly, but when it’s time for the 5th “live” challenge, the game freezes while “waiting for server”. This happens on all the color challenges. I’m able to do four but the fifth is unaccessible to me. I’ve come into the issue on both my Mac and my iPad. I’ve included an image.

exact same issue on both ios and PC

I have this same problem

i have this same problem

It stays stuck at connecting to service one being in the last stage of the fire event. Can’t finish it due to it freezing.

I have the exact same problem on ios

I just downloaded the game, and I'm unable to start the last color challenge match because the "waiting for the server..." screen never changes. Note that others replying to posts have this same problem (specific to the color challenge match), but this appears to be different from any of the other posts that are all related to non-AI matches.

When I try to start the final battles in any of the color challenge events the program just says it is waiting for the server, but it never proceeds to the game.

I am also having this exact same issue. Not a great new player experience here. Can't even get to play the game.

I'm having this exact same issue ever since yesterday, May 27th. I can play the bot color challenge matches and I can play normal matches against other players, it's only on the final color challenges that I'm stuck "Waiting for the server".

Same here. It only seems to happen in the final match, it has to be something to do with the server connecting to other people

I've recently completed my color challenges and am on the final battle for each deck besides red. Whenever I try to go into my final battle I get "waiting for the server" It does this for each of the final battles on the color challenges. I'm able to play regular matches just fine. I've uninstalled and reinstalled the game, but the issues is still happening.