FortiESNAC.exe repeatedly crashing [5.4.4.0890]

This is spamming the Application event log with these:

Fault bucket 116416005513, type 5 Event Name: BEX Response: Not available Cab Id: 0

Problem signature: P1: FortiESNAC.exe P2: 5.4.4.890 P3: 596fcd03 P4: MSVCR120.dll P5: 12.0.21005.1 P6: 524f7ce6 P7: 000a7666 P8: c0000409 P9: 00000007 P10:

 

The client log refreshes every time one of these is generated with 'No updates available'. I have the FCEMS profile set to check every hour. This is checking several times a minute. Watching the task manager, FCHelper64.exe spawns multiple processes and then closes them.

Endpoint is on Windows 10 x64, Creator's Edition