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EXTREMELY IMPORTANT: Please attach a ZIP file containing your Akeeba Backup log file in order for us to help you with any backup or restoration issue. If the file is over 2Mb, please upload it on your server and post a link to it.

Description of my issue:

On one of my sites I repeatedly have a DropBox V2 upload fail due to an expired access token.

When I update the Authentication Access and Refresh tokens, the backup works that one time, but if I try again another day I get the same error.  I have other sites where this hasn't been an issue.

I've seen other people who have reported this issue on the forum.

I am always up-to-date with Joomla, Akeeba Backup, and what the web host offers as far as PHP version 7.4.x.

Any ideas of what the issue is and what can fix it?

Thank you.

These backups were done manually from the back end administrator.

I also have automated backups (cron task) set up for this site.  I just looked at the backups.  The eight cron backups before this semi-failed.  That is, the folder was created for the backup, and the .jpa file got uploaded, but none of the .j01, j02, etc. files got uploaded.

I have some other sites that have identical backup setups, and none of the Joomla ones are failing the automated cron backups.

I also have a single WordPress site that is exhibiting the same failures.  That is, the .jpa is uploading, but none of the other files.

I've attached a zipped log file that failed on the original site.  I can see the lines that talk about the DropBox failure.  If you want the WordPress log files let me know.

Thanks.

An additional observation.   The J01, J02, etc files are accumulating in the backup folder on the server, so they are just not getting transferred to Dropbox.

Hi - I've removed the checkbox on the DropBox "Enable chunk upload" option and it seems to have fixed the problem.  All parts are now uploading properly to DropBox.

I waited to give this solution a week to make sure all my automated backups worked properly, and they have been.  So far all my manual backups are also working properly.

Thank you for your help.