A follow up. When WP_DEBUG is set to true, this Notices are printed in the backend header:
Notice: Use of undefined constant Mfma_rlMediaSelector - assumed 'Mfma_rlMediaSelector' in /home/.../public_html/wp-content/plugins/media-file-manager-advanced/media-selector.php on line 430
Notice: Use of undefined constant PLUGIN_VERSION - assumed 'PLUGIN_VERSION' in /home/.../public_html/wp-content/plugins/media-file-manager-advanced/media-relocator.php on line 33
Notice: Use of undefined constant PLUGIN_VERSION - assumed 'PLUGIN_VERSION' in /home/.../public_html/wp-content/plugins/media-file-manager-advanced/media-relocator.php on line 34
I could replicate it in another WP 3.9.1 installation. In both sites, with debug mode on, when visiting the upload.php?page=mfma_relocator-submenu-handle page, this message is the only thing that appears:
SyntaxError: Unexpected token <
Notice: Use of undefined constant Mfma_rlMediaSelector - assumed 'Mfma_rlMediaSelector' in /home/.../public_html/wp-content/plugins/media-file-manager-advanced/media-selector.php on line 430
Notice: Use of undefined constant PLUGIN_VERSION - assumed 'PLUGIN_VERSION' in /home/.../public_html/wp-content/plugins/media-file-manager-advanced/media-relocator.php on line 33
Notice: Use of undefined constant PLUGIN_VERSION - assumed 'PLUGIN_VERSION' in /home/.../public_html/wp-content/plugins/media-file-manager-advanced/media-relocator.php on line 34
Fatal error: Maximum execution time of 30 seconds exceeded in /home/.../public_html/wp-content/plugins/media-file-manager-advanced/media-relocator.php on line 217
and in the chrome console this errors appear:
Uncaught SyntaxError: Unexpected token ILLEGAL upload.php?page=mfma_relocator-submenu-handle:178
Uncaught SyntaxError: Unexpected token ILLEGAL upload.php?page=mfma_relocator-submenu-handle:305
5
Uncaught TypeError: Cannot read property 'length' of undefined
