Solution: Download an older version, export old data of the leagues managed, deactive and uninstall the plugin, upload the older version, import the old data from de bakup.
You can find older versions at: https://www.ads-software.com/plugins/leaguemanager/developers/
I recommend you the 3.9.8 (svn) version. This version works well with visual composer
At least untill it will be fixed
