"Waiting for the Server..." crashes on MacOS Sequoia
After the latest Arena update from the Duskmourn release, I have been experiencing a persistent issue where the "Waiting for Server..." screen appears for extended periods of time in the middle of gameplay.
The disconnection happens at seemingly random intervals and can last for several seconds to indefinitely. Restarting the client will get the game started again but with a misrepresented board state.
MacBook Pro M1, macOS Sequoia 15.0
I have attached game logs of right after a client restart, as well as a log during gameplay (coincidentally right before one of these crashes took place)

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s9i#68054 commented
I saw the same error on MacOS X Sequoia.
I do not know the reason but, finally I solved this problem with the way below:
First of all, it seems that there are local database files in "/Users/*/Library/Application Support/com.wizards.mtga" .
The error may happen because there are some incompatible json formats or like that. So, rename "/Users/*/Library/Application Support/com.wizards.mtga" to a another name like "bak".
Next, boot MTGA application from EPIC games launcher. I finally could run app and play the matches!