Question Attachments and Uploading Problem

@AndyG @DI Admin

I don't know when this started but I'm seeing some issues with the attachments and uploading features.

When someone posts attachments there is no thumbnail preview. The only way to see the image is to click on the attachment and view it in a new tab. This is an issue on both PC and mobile.
*See "attachments.PNG".*

Normally I would insert the attached screenshot above but I can't do that because I am also unable to insert uploaded attachments to posts.
*See "attachmentupload.PNG".*

There are supposed to be two buttons when you upload an image, labeled "Thumbnail" and "Full Image" located under each attachments file name. These are not present if you upload one file. They do appear if you upload two images (these buttons are used to insert every image uploaded, not individual ones). However, neither of the buttons work.
*See "attachmentupload2.PNG".*

These "Thumbnail" and "Full Image" buttons are supposed to be shown under each attachment's file name and there should be a thumbnail preview of the image.

I believe this may be an image caching or JS compression issue on the server side.

 

I just completed a huge Windows update, didn't help. Using Chrome (same issue found with Edge browser). Adblock still disabled for DI. No other browser add-ons installed.

Having issues uploading to the "Media" section:
*See "attachmentuploadMedia.PNG".*
Note: This happens no matter the file size.

The Showcase section is also having problems. Upload never starts/completes:
*See "attachmentuploadShowcase.PNG".*

Inspect element errors screenshots attached.
Media Gallary Error: ErrorMedia.PNG
Showcase Error: ErrorShowcase.PNG

No related/recent server errors on the Admin Control Panel being shown.

Switching between the HTML5 uploader and the legacy flash uploader in the ACP does not resolve the issue either.