SymptomsIn details you can see:
"Directory attachments do not exist."
ResolutionYou should log into Sitebuilder admin CP -> Logs section and find full error message concerning attachments directory. Something like:
"Directory attachments do not exist. Path to dirname- /usr/local/sitebuilder/htdocs/sites/7b/7bb16565ccf67ec3ed73ff9939ae281a/data/storage/attachments"
After directory name is found out it is recommended to apply actions from article http://kb.sp.parallels.com/en/5389