IMPORTANT – Fix to "unknown error"

I updated the backup plugin last week, and now I am getting that “unknown error.”
Online Backup for WordPress Plugin Version 3.0.4
WordPress Version: 3.9.2 (standalone)
PHP Version: 5.2.17
Server Software: Apache
MySQL Server Version: 5.0.96-log
MySQL Client Version: 1.0; MySQL Packet Size: 32 MiB
Memory: 256M; Post: 33M; Upload: 32M; Timeout: 30
Memory Changable: Yes; Admin Cache Size: 205.66 KiB
Status: 1 row, 23.49 KiB packet size, 106.96 KiB cache freed, 3.64 MiB memory used
Capabilities: gzdeflate php5hash DES AES128 AES192 AES256
End of Information

Hello,

I still get the same errors (on 3 different websites, with different hostings) with a manual backup.

Time Type Event
28th august 2014 5.30.41 Error The activity failed: The server failed to retrieve the backup. The reason is unknown. Please consult the activity log.
28th august 2014 5.30.41 Error The server failed to retrieve the backup. The reason is unknown.
The unknown error token the server returned was: UNKNOWN_FAILURE

Online Backup for WordPress Plugin Version 3.0.4
WordPress Version: 3.9.2 (standalone)
PHP Version: 5.4.27
Server Software: Apache
MySQL Server Version: 5.5.37-log
MySQL Client Version: 1.0; MySQL Packet Size: 16 MiB
Memory: 128M; Post: 300M; Upload: 300M; Timeout: 30
Memory Changable: No; Admin Cache Size: 180.68 KiB
Status: 1 row, 24.86 KiB packet size, 160.39 KiB cache freed, 37.52 MiB memory used
Capabilities: hashcopy gzdeflate php5hash DES AES128 AES192 AES256
End of Information

I’m still getting the error as well.

Same here. Although I am getting further that I used to. On my sites, I see the following:

• The (local) backup hangs for a long time.
• After a few minutes, when it is done, the result-ZIP-file is corrupt.
• I can then make a new backup with good results.
• This is non-systematic but very irritating.

I’ll be a happy man when this problem is addressed. Thanks in advance.

Start: 5th Sep 2014 8.06.45 AM
End: 5th Sep 2014 8.12.44 AM

Backup Size: 0 B (0 files)
Total Size: 0 B (0 files)

Events
The server failed to retrieve the backup. The reason is unknown.
The unknown error token the server returned was: UNKNOWN_FAILURE

Requested Information
Online Backup for WordPress Plugin Version 3.0.4
WordPress Version: 3.9.2 (standalone)
PHP Version: 5.4.30
Server Software: Apache
MySQL Server Version: 5.5.38-35.2-log
MySQL Client Version: 1.0; MySQL Packet Size: 256?MiB
Memory: 256M; Post: 10M; Upload: 10M; Timeout: 30
Memory Changable: Yes; Admin Cache Size: 209.08?KiB
Status: 1 row, 16.21?KiB packet size, 160.3?KiB cache freed, 27.41?MiB memory used
Capabilities: hashcopy gzdeflate php5hash DES AES128 AES192 AES256
End of Information

Same here. Nothing seems to be fixed.