Humble key, lots of region restrictions; should all be factored into the system but banned countries listed below for your assistance.

KZ
LA
LB
LK
LY
MA
MD
ME
MK
MM
MO
MQ
MR
MV
MX
MY
NC
NI
NP
OM
PA
PE
PF
PH
PK
PR
PS
PY
QA
RE
RS
RU
SA
SG
SV
SY
TH
TJ
TM
TN
TR
TT
TW
UA
UY
UZ
VE
VG
VN
YE