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I did upgrade to 4.1.1, Everything is working fine, only one problem - Backup returning 0kb.
No any data lost, everything is working fine. Before upgrade my backup file was 644mb, after upgrade I did backup 4 times, I time was 633md, 3 times 0kb.
Please help me to resolve this problem
Is there is now body can help me with this problem
First place to look is in the php error log. Also important to know what operating system you are using.