Hi Calvin,
As I said, the image is uploading despite showing the error, as the image gets uploaded to the media section if seen separately. So it seems it’s not an issue with the uploading part. But, while trying to change the site logo, the access to library goes into a non-responsive mode.
It’s not a fresh install, have been happily using DW Minion more than 18 months now.
WordPress version is 4.1 (latest). Hosting is from iPage.
Let me know in case you need anything else.