I have the Bootstrap 4 (Oldgregg) theme. In One of the article when I publish while the abstract does not appear, all the texts that appear in the left column (PDF, References, Details) are strike-through text as you can see in following images?.
@rmosavi, I see that the page isn’t fully loaded. Do you have an access to the PHP error log? It should contain something regarding this issue, relevant are errors and fatal errors that occur just after you trying access this page.
I have just upgraded from 18.104.22.168 to the latest version then use the latest oldGregg. Here is the error log [28-Oct-2018 12:27:56 UTC] PHP Fatal error: Class 'JATSParser\Body\Document' not found in /home/k2542002/public_html/plugins/themes/oldGregg/OldGreggThemePlugin.inc.php on line 185
The reason behind this error is that sometime ago JATS Parser plugin was installed to the system. This plugin has conflicts with the same classes inside Old Gregg theme and I’m trying to avoid them. In you case this check empty($jatsParserSettings) gives false and Old Gregg theme fails to load. This happens if JATS Parser plugin was deleted from the system without prior deactivation.