If the backup file name contains the date, and the verification of the backup begins after this date, the verification will fail with "No such file or directory
" error.
E.g backup file name contains the day, backup begins at day 1, finishes at day 2, verifications tries to access backup file referencing day 2 and not 1.
Thanks for pointing this out - I will fix this bug in Webmin 1.520.
Thank you Jamie, fast as usual.