Unable to create DB Backup

[ChurchCRMBugReport]

Collected Value Title	Data
Page Name	/BackupDatabase.php
Screen Size	1024x1280
Window Size	869x1280
Page Size	869x1280
Platform Information	Linux scotchbox 3.13.0-55-generic #94-Ubuntu SMP Thu Jun 18 00:27:10 UTC 2015 x86_64
PHP Version	7.0.14-2+deb.sury.org~trusty+1
ChurchCRM Version	2.6.0
Reporting Browser	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
Prerequisite Status	All Prerequisites met
Integrity check status	{"status":"success"}
Apache Modules	core,mod_so,mod_watchdog,http_core,mod_log_config,mod_logio,mod_version,mod_unixd,mod_access_compat,mod_alias,mod_auth_basic,mod_authn_core,mod_authn_file,mod_authz_core,mod_authz_host,mod_authz_user,mod_autoindex,mod_deflate,mod_dir,mod_env,mod_expires,mod_filter,mod_headers,mod_include,mod_mime,prefork,mod_negotiation,mod_php7,mod_rewrite,mod_setenvif,mod_socache_shmcb,mod_ssl,mod_status

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