I just want to put to your attention this issue we have been facing using sitefinity 3.7
At some point of time, whenever we upload images to a image gallery or other types of gallery, we get this error. What we then do is restart our machines and it works back again. This error is from time to time this week.
The site we are working on is: www.sdc.org.qa
SEE attached screen grab.
Please let us know if this is a sitefinity behavior of some sort.
Gulf Interactive, Qatar