During installation of v126.96.36.199b over v6.6.1 an unhandled exception was detected.
After return to control pannel a backup was succesfully executed.
In attached zip-file a pdf and html copy of the errorpage
|Joomla! version (in x.y.z format)||3.9.13|
|PHP version (in x.y.z format)||7.3.7|
|Akeeba Backup version (x.y.z format)||188.8.131.52b|