Are you sure you want to go to an external site to donate a monetary value?
WARNING: Some countries laws may supersede the payment processors policy such as the GDPR and PayPal. While it is highly appreciated to donate, please check with your countries privacy and identity laws regarding privacy of information first. Use at your utmost discretion.
For instance, it doesn't seem to run on http://dot-flow.deviantart.com/gallery/31393295/fanart .
It runs smoothly on any other gallery, though. The only thing I can think of is that this gallery belongs to a group rather than one person's actual account.