I don’t have enough PHP experience to know what to do with that, but I found a plugin (Development Debug Backtraces) that did it for me!
Here’s what it says:
#0 error_backtrace(2, implode() [function.implode]: Invalid arguments passed, /home/[account]/public_html/mysiteurl.com/wp-admin/includes/class-wp-plugins-list-table.php, 421, Array ([item] => Array ([0] => testimonials-widget/testimonials-widget.php,[1] => Array ([Name] => Testimonials Widget,[PluginURI] => http://ww.wp.xz.cn/extend/plugins/testimonials-widget/,%5BVersion%5D => 2.13.5,[Description] => Testimonials Widget plugin allows you to display random or selected portfolio, quotes, reviews, showcases, or text with images on your WordPress blog.,[Author] => Michael Cannon,[AuthorURI] => http://aihr.us/about-aihrus/michael-cannon-resume/,%5BTextDomain%5D => ,[DomainPath] => ,[Network] => ,[Title] => Testimonials Widget,[AuthorName] => Michael Cannon)),[status] => all,[page] => 1,[s] => ,[totals] => Array ([all] => 24,[search] => 0,[active] => 18,[inactive] => 6,[recently_activated] => 4,[upgrade] => 0,[mustuse] => 0,[dropins] => 0),[plugin_file] => testimonials-widget/testimonials-widget.php,[plugin_data] => Array ([Name] => Testimonials Widget,[PluginURI] => http://ww.wp.xz.cn/extend/plugins/testimonials-widget/,%5BVersion%5D => 2.13.5,[Description] => Testimonials Widget plugin allows you to display random or selected portfolio, quotes, reviews, showcases, or text with images on your WordPress blog.,[Author] => Michael Cannon,[AuthorURI] => http://aihr.us/about-aihrus/michael-cannon-resume/,%5BTextDomain%5D => ,[DomainPath] => ,[Network] => ,[Title] => Testimonials Widget,[AuthorName] => Michael Cannon),[context] => all,[screen] => WP_Screen Object ([action] => ,[base] => plugins,[] => 0,[id] => plugins,[] => site,[is_network] => ,[is_user] => ,[parent_base] => plugins,[parent_file] => plugins.php,[post_type] => ,[taxonomy] => ,[] => Array ([overview] => Array ([title] => Overview,[id] => overview,[content] =>
//plugin help text deleted by me//
,[callback] => ),[compatibility-problems] => Array ([title] => Troubleshooting,[id] => compatibility-problems,[content] =>
//plugin help text deleted by me//
,[callback] => )),[] =>
//plugin help text deleted by me//
,[] => Array ([per_page] => Array ([label] => Plugins,[default] => 999)),[] => 1,[] => ),[actions] => Array ([0] => Settings,[deactivate] => Deactivate,[edit] => Edit),[is_active] => 1,[plugin_name] => Testimonials Widget,[description] =>
,[prefix] => ,[class] => active,[checkbox_id] => checkbox_64629c27612138bc1ceb2db26630b681,[checkbox] => Select Testimonials Widget,[id] => testimonials-widget,[columns] => Array ([cb] => ,[name] => Plugin,[description] => Description),[hidden] => Array ([0] => ),[column_name] => description,[column_display_name] => Description,[style] => ,[plugin_meta] => ,[author] => Michael Cannon))
#1 implode( | , ) called at [/home/[account]/public_html/mysiteurl.com/wp-admin/includes/class-wp-plugins-list-table.php:421]
#2 WP_Plugins_List_Table->single_row(Array ([0] => testimonials-widget/testimonials-widget.php,[1] => Array ([Name] => Testimonials Widget,[PluginURI] => http://ww.wp.xz.cn/extend/plugins/testimonials-widget/,%5BVersion%5D => 2.13.5,[Description] => Testimonials Widget plugin allows you to display random or selected portfolio, quotes, reviews, showcases, or text with images on your WordPress blog.,[Author] => Michael Cannon,[AuthorURI] => http://aihr.us/about-aihrus/michael-cannon-resume/,%5BTextDomain%5D => ,[DomainPath] => ,[Network] => ,[Title] => Testimonials Widget,[AuthorName] => Michael Cannon))) called at [/home/[account]/public_html/mysiteurl.com/wp-admin/includes/class-wp-plugins-list-table.php:296]
#3 WP_Plugins_List_Table->display_rows() called at [/home/[account]/public_html/mysiteurl.com/wp-admin/includes/class-wp-list-table.php:796]
#4 WP_List_Table->display_rows_or_placeholder() called at [/home/[account]/public_html/mysiteurl.com/wp-admin/includes/class-wp-list-table.php:736]
#5 WP_List_Table->display() called at [/home/[account]/public_html/mustieurl.com/wp-admin/plugins.php:431]
—————————————————————–
Is this helpful? I deleted the chunks of help text about plugins that was included above. Hope that’s ok. Let me know if there’s anything else I can do on my end.
Thanks for your help, Michael!