Why install extension tips "Dependency source failed"

Why installation extension will prompt “dependent source failed”

→ Finished Dependency Resolution
You could try using --skip-broken to work around the problem
You could try running: rpm -Va --nofiles --nodigest
Can not be installed.

Hello,

Can you mention PHP version and extension name?

Thanks.

PHP5.5, except for the default installation, all the rest of the plug-in, when installed, are the same tips

Hello,

Is this centos 7 fresh install of version 1.6RC1 for the cyberpanel.