The file ***.jpg does not appear to be writable.

I just recently installed your plugin for our company’s website, and purchased the “Unlimited” plan as there are about 2,000 images on the website to convert. About 250 images converted, and the remaining 1,600 all have the same error:

“The file wp-content/uploads/####/##/xxx.jpg does not seem to be writable.”

(The number signs and x’s being replaced by actual numbers/file names respectively of course.)

I’ve looked through the forums and saw a helper plugin recommended to others to try and use, but the same problem occurs with it installed. Also double checked the permissions on all folders and files, and I can confirm all folders have 755 permissions and all files have 644 permissions. I don’t know why only some files convert and the rest don’t.

Any other ideas/work arounds I can do to bulk optimize the rest of my images?