If you use iCloud or the likes of Dropbox you can normally get a sharing URL that allows the recipient to download (but not edit) the original, i.e. deliver a copy. Or zipping a TBX often makes it considerably smaller as an attachment, lest attachment file size is the issue. HTH.
I’ve got it! But this log appears to be a hang (spinning pizza cursor) rather than a crash (premature termination). I ask just to be sure we’re looking at the right log!