The slider View had been working perfectly fine in the past, but the client had not added any new "Projects" for a long time. So it seems it is just something that seems to have happened in a more recent update.
I have attached a screenshot of the part of the page where the View Slider is embedded – using the shortcode [wpv-view name="projects-slider"]. I have also uploaded a screenshot of the Pagination settings.
Can you please send me admin access details and let me reivew whats going wrong with your setup.
*** Please make a FULL BACKUP of your database and website.***
I would also eventually need to request temporary access (WP-Admin) to your site. Preferably to a test site where the problem has been replicated if possible in order to be of better help and check if some configurations might need to be changed.
I have set the next reply to private which means only you and I have access to it.