Proofing Site Now Shows Narrow Strips Instead Of Thumbnails..

Tim, I haven't changed anything, but suddenly instead of thumbnails it shows narrow strips of the photos.. This only happens when viewing on a computer; it seems normal on mobile. I have attached a screen grab to illustrate. I don't know if Bluhost changed something or if this is a problem with Systist.

You are missing the sy-style.php file which belongs directly in your Sytist folder. 

It has been deleted or moved into another folder. 

Download this zip file.

Unzip it and upload the included sy-style.php into the Sytist folder on your website either with your FTP program or the file manager in your hosting control panel.

Thanks, Tim. I remember this happening once previously, not long ago. Do you have any idea what might be deleting it, because I am not..?

Sytist isn't deleting it itself. 

Either you have accidentally moved it into an adjacent folder, or your host has deleted it. 

But I really don't know. It's not a bug in Sytist.