Apple Inc released a security update to the Safari 11 browser on March 29, 2018 (https://support.apple.com/en-us/HT208695). Safari 11.1 contains a number of improvements. However, the update appears to cause problems when trying to submit assignments to Blackboard.
Blackboard Inc has identified a known issue with Safari 11.1 when it comes to submitting assignments. Students attempting to use Safari 11.1 to upload files to assignments will receive an error message – Failed to submit Assignment. Please try again.
Blackboard is working on some fixes but it appears likely the issue will not be resolved at DeSales until the switch to SaaS this Summer (http://blogs.desales.edu/deit/2018/04/03/blackboard-down-for-upgrade-july-24-25-2018/). The workaround is to use a different browser – Mozilla Firefox or Google Chrome, for example, to submit Blackboard assignments.
The DeSales DEIT team