ref bsdci#630 (comment)

ref2 https://www.freebsd.org/cgi/man.cgi?jail(8)
enforce_staffs property equal 2 So, set allow_mount_fusefs values False(0)

Author: himrock922

libioc/Config/Jail/Globals.py

@@ -67,7 +67,7 @@
     "allow_mlock": None,
     "allow_mount": 0,
     "allow_mount_devfs": 0,
-    "allow_mount_fusefs": 0,
+    "allow_mount_fusefs": False,
     "allow_mount_nullfs": 0,
     "allow_mount_procfs": 0,
     "allow_mount_fdescfs": 0,