The help menu
The "?" in the hub toolbar: Contact support (opens your mail app), Open
log folder (the data folder's logs/), Software updates. When the app
itself hits an error, it shows an error card with Copy details, Open log
folder and Reload — and writes the error into the same log.
TIP
Open log folder is the fastest first step for any support mail.
vidvertex.log in that folder holds the render and upload lines of the run you
are asking about.