PHP Issues

Just tried this on a localhost test site using PHP7. When I activated the plugin I received a message saying:

The plugin generated characters of unexpected output during activation. If you notice “headers already sent” messages, problems with syndication feeds or other issues, try deactivating or removing this plugin.

I also found several PHP errors. You should develop using the plugin, Query Monitor, to detect and fix these issues.

https://www.ads-software.com/plugins/wp-recall/