The error seems to be caused by this line in the dropbox-foldershare.php file.
$url_biblepost = WP_PLUGIN_URL . “/dropbox-foldershare/script/DropBoxFolderShare.js”;
I changed it to $url_biblepost = plugins_url(‘/script/DropBoxFolderShare.js’, __FILE__); which at least shows the icon in the toolbar.
On further investigation, I think this plugin may no longer work because Dropbox no longer uses the public folder structure and requires and Access Token. Which this plugin doesn’t have any code for. More here: https://www.dropbox.com/developers/core/api#shares
Ignore my post…there was a problem with the plugin folder name. Renaming the plugin folder name resolves most of the issues. The plugin installs to dropbox-folder-share and the code in dropbox-foldershare.php is looking for the Javascript in the dropbox-foldershare folder.
