https://www.cisco.com/c/en/us/support/docs/field-notices/741/fn74140.html
Field Notice: FN74140 - Cisco Firepower Software: Cisco Secure Client Images Larger Than 100 MB...
When it is running an affected release, Cisco Firepower Management Center (FMC) Software might be unable to upload Cisco Secure Client (AnyConnect) images that...