April 4, 2019 - JFBConnect v8.1.0 has been released with changes for the LinkedIn Developer Program Updates and miscellaneous bug fixes.
In the past, the main cause of missing G+ buttons is from the use of the RokBooster plugin, or a few other 'optimization' plugins which incorrectly alter the <g:plusone> tag and turn it into <plusone>. With that change, but the button won't show. If you're using any optimization plugins, try disabling them to see if that helps.
Otherwise, can you let me know a URL where we can see an article where they are missing?
Uncaught Error: no JobTitle provided framework?v=0.0.2000-RC1.29365-1407&lang=undefined:1329
The problem apply button looks to be from this code:
<script type="IN/Apply" data-companyid="2428569" data-email="<email>" data-joblocation="Singapore" data-logo="<domain>/templates/siteground6/images/header.jpg" data-themecolor="#5573b7" data-phone="required"></script>
Hopefully, that helps you find the specific apply button that you need to update with the Job Title.
I hope that helps get you going,
With the information above, hopefully you can tell what job posting that was supposed to be, then find it in the admin area and edit it's settings to properly give it a Job Title. I don't know what posting it is, but it must have been created somewhere on your site. It's for a job in Singapore and is trying to be shown on that page.
I hope that helps provide more information. The job posting wasn't automatically created by JLinked though, so there's only so much I can help you find about it.