We really appreciated that Eric offered a feedback and helped us refine the plugin.

The issue description

Eric said:

Surprise: I was hoping to backup my MainWP site when I discovered that activating MainWP makes the ‘Test and Submit’ button irresponsive in both the FTP ans SFTP remote accounts (no window opening requesting data). Other accounts seems to works.
TIA

What is the cause of this issue?

This is cuased by the compatibility issue between MainWP and Backup WordPress Site by WPvivid.

The solution

The compatibility issue is resolved in version 0.9.12. However, if any user still encounters the issue, please update Backup WordPress Site by WPvivid plugin to the latest version.