Dear all,
I had the same problem and I had done everything mentioned in the notes. However, it didn’t help.
I found a site teaching me how to solve this problem at the end. I have just tested it and it really worked.
You may have a look of this site:
https://www.chewie.co.uk/general/wordpress-image-upload-http-error/#solution
I hope this can help you. ^-^
