Here is the text from the email alert we receive, it doesn't provide much detail, when they shortened the bookmark name from 66 characters to 59, it worked:
Description
JETSTREAM_USER_CONTAINER_CREATE_BOOKMARK job for "MARKITEDM_MASTERMIND_DX" failed due to an error during execution: Failed to create bookmark "MM: Sprint 12 _ LF & MM Code till Sprint 10 _ With_ Quality_Rating".
Action
Try creating the bookmark again. If this operation continues to fail contact your Delphix administrator.
Command Output
{4}
Severity
CRITICAL
Hostname
vath0071
Target
MARKITEDM_MASTERMIND_DX
Timestamp
2015-10-06 17:38:53.239