I am getting this error even with the desktop version of safari. Closing and re-opening safari is a workaround: apple privacy relay safari can't open the page. The error is: "The operation couldn't' be completed. No space left on device" (NSPOSIXErrorDomain:28)

Do I understand that correct, we need to pay $99 to get a Developer Account just to have a look in the SDK ? I have no clue if the SDK will help me or not, before having an eye on it?!