500 error Request url '/2/files/upload_session/append_v2' method 'POST'

Dropbox-Request-Id:

[2022-04-22T04:47:53+03:00] ERROR 'site.com' upload have been ended with error, error1: 'Request url 'https://content.dropboxapi.com/2/files/upload_session/append_v2' method 'POST' failed, X-Dropbox-Request-Id '2a9d24e407454b2c80d3fd0202522614' response code '500', error: ''' PID=25296 PLAN_ID=3
[2022-04-22T04:47:53+03:00]  INFO Sleep 10 second for reconnect PID=25296 PLAN_ID=3
[2022-04-22T04:48:03+03:00]  INFO Deletion of an incomplete copy '/Backups/site.com/2022.04.22_04-33-21_Dropbox site.com_88.99.***.***/site.com.tar.gz' PID=25296 PLAN_ID=3
[2022-04-22T04:48:03+03:00]  INFO Incomplete copy have been deleted successfully PID=25296 PLAN_ID=3
[2022-04-22T04:48:03+03:00]  INFO Try to upload 'site.com', attempt number 2 PID=25296 PLAN_ID=3
[2022-04-22T04:49:25+03:00] ERROR 'site.com' upload have been ended with error, error1: 'Request url 'https://content.dropboxapi.com/2/files/upload_session/append_v2' method 'POST' failed, X-Dropbox-Request-Id 'b3ab423600f146f3af78778c72eb75e2' response code '500', error: ''' PID=25296 PLAN_ID=3
[2022-04-22T04:49:25+03:00]  INFO Sleep 10 second for reconnect PID=25296 PLAN_ID=3
[2022-04-22T04:49:35+03:00]  INFO Deletion of an incomplete copy '/Backups/site.com/2022.04.22_04-33-21_Dropbox site.com_88.99.***.***/site.com.tar.gz' PID=25296 PLAN_ID=3
[2022-04-22T04:49:35+03:00]  INFO Incomplete copy have been deleted successfully PID=25296 PLAN_ID=3
[2022-04-22T04:49:35+03:00] ERROR Cannot backup 'site.com': exceeded retry limit PID=25296 PLAN_ID=3
[2022-04-22T04:49:35+03:00]  INFO Start backup 'site_com' database PID=25296 PLAN_ID=3
[2022-04-22T04:49:36+03:00]  INFO On storage volume: '/' available 2076861 mb of free space PID=25296 PLAN_ID=3
[2022-04-22T04:49:36+03:00]  INFO Try to upload 'site_com', attempt number 1 PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00]  INFO 'site_com' was uploaded successfully PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00]  INFO Copy info was saved in database PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00]  WARN Plan 'Dropbox site.com' ended with errors: Cannot backup 'site.com': exceeded retry limit
  PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00] ERROR Plan 'Dropbox site.com' ended with errors: Cannot backup 'site.com': exceeded retry limit
  PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00]  INFO Starting remove old copies of 'Dropbox site.com' backup plan PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00]  INFO Old copies have been removed successfully PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00]  INFO Starting check copies PID=25296 PLAN_ID=3
[2022-04-22T04:51:00+03:00]  INFO Copies of 'Dropbox site.com' have been checked copies successfully PID=25296 PLAN_ID=3
[2022-04-22T04:58:32+03:00]  INFO Starting 'Local_site' backup plan PID=26192 PLAN_ID=5
[2022-04-22T04:58:32+03:00]  INFO Starting backup 'site.com' web site PID=26192 PLAN_ID=5
[2022-04-22T04:58:34+03:00]  WARN Disk quota is disabled PID=26192 PLAN_ID=5
[2022-04-22T04:58:34+03:00]  INFO On storage volume: '/var/www/fastuser/data/backups' available 821744 mb of free space PID=26192 PLAN_ID=5
[2022-04-22T04:58:34+03:00]  INFO Try to upload 'site.com', attempt number 1 PID=26192 PLAN_ID=5