Description of my issue: Front-end backup fails - does not complete.
The Angie report indicates:
if your part size is more than 5Mb (or it's 0) please try part sizes of 20, 10, 5 and 2Mb.
If you still get this error, change time settings inside Akeeba Backup; try minimum execution time 1, maximum 7 and runtime bias 50. If this doesn't work try minimum 5, maximum 3 (yes, max is less than min) and bias 50.
For which I have tried all suggested variations without success.
I can manually run a backup from the administrator interface.