Post-processing of the image likely failed because the server is busy

Post-processing of the image likely failed because the server is busy

We came across this error for the first time recently when a client emailed over an image he was having trouble uploading to his WordPress membership site.

A bit of research later showed this warning can be caused by quite a few issues – but an easy one to rule out right away (which we failed to notice) is whether your filename contains any punctuation marks as that’s kryptonite to some servers.

If that doesn’t fix the issue try using incognito mode or a different browser. Cache and cookies can cause WordPress any number of weird issues.