Gallery not uploading builds greater than 30x20 lots

hi, Every time i try to upload a build more than a 30x20, i have a error message (along the lines of) 'cannot perform this action, please try again later'. Also affects saving to my library. This as been happening now since the burglar update. i play with 1 mod - mccc, which is up-to-date, but happens with or without it installed.