UMT ldn l21 dead umt error solution need

[pakistan786]

Operation : Flash
Checking for existing devices...Not Found
Turn Off phone, hold Vol UP + Vol DOWN and insert USB cable.
Some phones may need Special Boot Cable or TestPoint for EDL mode.
Found Port : Qualcomm HS-USB QDLoader 9008 (COM54)
Driver Info : Qualcomm Incorporated, qu_usb_serial.sys, 2.1.2.0
Connecting to phone...OK
Waiting for response...OK
Init Handshake Sequence...OK
Hardware ID : E1F00400 [8937] 41001500
OPK_DATA : 3B48AE9023196AE5C8162BCE65CB66E9636C784CB52A55046D15110FD8B11688
Initializing Protocol...OK
Using Auto Loader Selection [1]
Preparing Loader...Done
Sending Loader [8937_034]...Done
Executing Loader...OK
Detecting Chip Type...OK
DebugData : UXVhbGNvbW0gSFMtVVNCIFFETG9hZGVyIDkwMDggKENPTTU0KT==
Using Alternate Method...
DebugData : UXVhbGNvbW0gSFMtVVNCIFFETG9hZGVyIDkwMDggKENPTTU0KT==
Error getting Payload Information!
Error Log : UXVhbGNvbW0gSFMtVVNCIFFETG9hZGVyIDkwMDggKENPTTU0KT==
Please use correct loader and check USB port / cable.