I’m getting a similar error and warnings after updating my plugins. The only way I can get the error to go away is if I deactivate my blog-linking plugin.
I noticed after updating my plugins that there was a warning about the blog linking plugin and that it had been deactivated. It wasn’t available to reactivate on my on my list of plugins so I tried to reinstall it. The first time it wouldn’t reinstall because it said the folder already existed. I tried a second time and it appeared to install just fine. But that’s when the error and warnings showed up below.
The website is ProjectsInMetal.com/forum – but the plugin is currently inactive.
Warning: include_once(/problem-with-post-edit-buttonome/content/77/7671077/problem-with-post-edit-buttontml/projectsinmetal/wp-content/sp-resources/forum-plugins/blog-linking/template-tags/sp-linking-show-link.php) [function.include-once]: failed to open stream: No such file or directory in /problem-with-post-edit-buttonome/content/77/7671077/problem-with-post-edit-buttontml/projectsinmetal/wp-content/sp-resources/forum-plugins/blog-linking1/sp-linking-plugin.php on line 454
Warning: include_once() [function.include]: Failed opening '/problem-with-post-edit-buttonome/content/77/7671077/problem-with-post-edit-buttontml/projectsinmetal/wp-content/sp-resources/forum-plugins/blog-linking/template-tags/sp-linking-show-link.php' for inclusion (include_path='.:/usr/local/php5/lib/php') in/problem-with-post-edit-buttonome/content/77/7671077/problem-with-post-edit-buttontml/projectsinmetal/wp-content/sp-resources/forum-plugins/blog-linking1/sp-linking-plugin.php on line 454
Fatal error: Call to undefined function sp_do_TopicHeaderShowBlogLink() in /problem-with-post-edit-buttonome/content/77/7671077/problem-with-post-edit-buttontml/projectsinmetal/wp-content/sp-resources/forum-plugins/blog-linking1/sp-linking-plugin.php on line 455