Plugin cannot be viewed in write-protected environments

When the plugin is installed in a write-protected environment, the plugin’s admin page cannot be viewed by admins because the capability check fails (install_plugins).

Using the activate_plugins capability check in line 73 of the plugin would be a better check.

Pantheon’s test and live environments are write-protected and do not allow for installing plugins directly through the WP Dashboard. As a result, this plugin cannot be used by Pantheon sites.