[iMore Question]

No details but error screen

[nikkisharif]

No details but error screen

I would do a clean install & send feedback to Apple, if this issue persists. It’s probably just the usual beta bug.

[Annie_M]

No details but error screen

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[Lee_Bo]

No details but error screen

Well since it’s still in developer mode and hasn’t even reached beta status yet, you’ll need to submit feedback directly to Apple.

[Just_Me_D]

I’ve updated my MacBoo Pro with the newest macOS beta, but I haven’t messed around with the Mail app yet. I’ll provide an update when I do.

[Just_Me_D]

I’ve only configured my iCloud account thus far after a clean install of macOS Big Sur, and thus far, I’ve not found any glitches or situations in which the Mail app did work properly. I randomly opened mail and attachments all the way back to 2013. Nothing has appeared abnormal to this point so I recommend a clean install.