Cannot upload images to Backlight thru LR Publisher

[Pideja]

I’m trying to update my gallery but I get this message:

As far as I can tell, these jpegs are normal, processed in LR/Photoshop and exported from the TIFF master file to a jpeg folder within LR. I then drag the file to the Publisher module.
When I try to drag and drop the file directly into Backlight, I get this message:

UPDATE: I tried, as a test, to upload an image from a previous gallery that already had been successfully uploaded… the same result.

What’s wrong?

[Pideja]

YET ANOTHER UPDATE:

I reloaded the Lightroom Publisher Plugin (Latest version: 5.2.1) and the situation is now back to normal.

[mridley]

That is normally an error with the hosting configuration, you will need to increase the max file upload size in the PHP.ini file.