Same issue - just texted support for a resolution.

Edit to add that Big Sur was fully updated also.

HERE IS A COPY OF THE EMAIL SUPPORT SENT ME...

Roma (Plarium Support Center | Mobile Games) 

Feb 25, 2021, 1:37 GMT+2 

Hello!

If you cannot log into the game or are experiencing performance-related issues, please try one of the following workarounds:
1. Change your connection method or use a VPN service to switch your IP address (e.g., Turbo VPN for mobile devices).
2. Run the game on your PC via Plarium Play launcher or use a different device:
https://plarium.com/en/plarium-play/

Please check the answers to some commonly asked questions:

The game gets stuck at the end of the battle
The error occurs when you exceed 1500 turns. This limit prevents the game server from being overloaded with infinite battles. Please try changing your Champion Team to beat the Stage quicker.

Artifacts disappear in the game
You may face a situation where Artifacts are not displayed on your Champions and in your Collection. It's a visual bug. To solve it, try restarting the game or clearing its cache. The game developers are already working on a solution.

Check our Raid Knowledge Base to find guides, FAQ, and info on the current server status: http://plrm.me/kb_tech

We also have an official Discord channel, where we post information about the maintenance periods and server-related issues. You are welcome to join it at https://plrm.me/raid_discord

Our support team will contact you if additional investigation is required. We also don't give compensations on a case-by-case basis.

LATEST SUPPORT TICKET

Hello!
Thank you for contacting us.

New devices produced by Apple - MacBook Pro 2020, MacBook Air 2020, and Mac Mini 2020 include a new M1 chip, which is currently not supported by our application.

Unfortunately, we cannot provide you with the ETA when this issue will be resolved.

Regards,

Volodymyr
Player Support Team

Plarium,

This M1 notation SHOULD BE ADDED to the OS requirements. As of today, the M1 non-support is NOT mentioned on the OS requirement screen.

Business ethics be damned!

Thank  you  for  adding  the  M1  support!

Well, 

glad to hear your issue was resolved. If it persists, by any chance, let me know so I can forward the compatibility issue to devs.

Hoping for some clarification.  Can you install Plarium play on an apple computer with the M1 chip?  Just looking for clarification on the "adding the M1 support!" comment.

That should be the case now, if there are any issues, let me know.

Hello,

I am also having the issue of not being able to install Plarium Play on my Macbook Air M1. Any advice or assistance would be greatly appreciated.

Following this thread. I also just got a new macbook and because of the M1 support issue I cannot install Plarium Play either. Please let us know when this is resolved. I am sure desgining to new chip architecture is a challenge. Looking forward to being able to play again on my mac!

I just purchased a 2021 Macbook Pro with the M1 chip and Plarium Play will not install. Has this issue been resolved or not? Please let me know ASAP.

Thanks.

I have the new  Mac Mni w/ the M1 chip. I can not log in Raid Shadow Legends. It keeps giving me an log-in error at the log-in screen. I've uninstalled and reinstalled several times. Does not work! Any suggestions??

Mismo problema que los anteriores, en el MacBool Air 2020  con chip M1, no se puede instalar Plarium Play.

Are we able to play on the mac with the M1 chip yet ? i am running into installation issues .

Hmmm. I will effort an answer for you.

You can also give Bluestacks a try if Plarium Play is giving you issues. It is what I use most of the time to play Raid.

I tried through Blue stacks and it says it doesnt support the M1 

I'm trying to install Plarium Play and Bluestacks on my Macbook Air m1 and neither of them work, anyone that has a solution?