I made some tests with Avada 5.02.
The problem reported by @lycralad could be related to a change in the shortcode names provided by Avada’s Fusion Builder. Currently the shortcodes are like [fusion_button ... ] ... [/fusion_button]
and not like [button ... ] ... [/button]
. I think it should be sufficient to replace occurrences of button with fusion_button. I would suggest to contact Themefusion support about that.
Regarding the problem reported by @the_enn and @pnilz I wasn’t able to reproduce the issue, so it’s possible that there’s a conflict with another plugin. Please check our troubleshooting FAQ, and in particular take a look at your browser’s console.
By the way I confirm that with the latest version of Avada the Fusion Builder icon doesn’t appear in the editor toolbar of widgets created with Black Studio TinyMCE Widget. That’s because Fusion Builder loads its assets only in pages “post.php” and “post-new.php” and not in widgets.php. If they could provide a way (function or hook) to force the loading of the assets from a 3rd party plugin, I could add a snippet to allow for compatibility, but at the moment this seems not possible. Please forward this information to Themefusion dev team, I am available to collaborate with them in order to find a solution.