I am getting this error on and off when adding item to Sandbox: 21916516 : Category (Cat #) requires custom item specifics. Category (Cat #) only accepts custom item specifics. Using the same code one day it works all day and is successful then the next day it returns this code. I don't understand if it's the same code why one day it works and the next it doesn't. Just wondering if something is wrong with the Sandbox server?
After submitting the request about 5 times I get the same failure using the API Tool as well: 2015-09-28T18:44:43.790Z Failure Internal error to the application. Internal error to the application. 10007 Error RequestError 931 E931_UNI_API5_17617533_R1