For running J!5.1 you must https://fabrikar.com/forums/index.php?wiki/update-from-github/ or include the new file manually https://fabrikar.com/forums/index.php?threads/joomla-5-1-and-fabrik-cannot-find-files-error.54473/post-285151 See also Announcements
See Announcement
We are still working on the Joomla update.
So i will have 3 folder inside /plugins/fabrik_visualization/fusioncharts/lib ?I recommend you start with the Fusion Charts Free 2.2 version, which you can get from here:
http://www.fusioncharts.com/goodies/fusioncharts-free/
Unzip it, and upload the FusionChartsFree folder to:
./plugins/fabrik_visualization/fusioncharts/lib
Then select the "Free 2.2" as you FC version.
-- hugh