USSD (again)

RouterOS General
1

Hi all!

not send ussd:
/interface lte at-chat lte1 input=“AT+CUSD=1,"*100#",15”
output: ERROR

in log:
lte1: rcvd ERROR

912UAG-2HPnD 6.46.3
Huawei ME909u-521 12.636.11.01.00

why error?

thx for help