invalid signature

[73F0SG1R]

issue with invalid signature, not identified as a valid evtx file

PS C:\Users\user\Downloads> C:\Tools\ir\kape\Modules\bin\EvtxECmd\EvtxECmd.exe -f .\dicovery_4661_net_group_domain_admins_target.evtx --csv C:\Users\user\Downloads\ --csvf dicovery_4661_net_group_domain_admins_target.csv
EvtxECmd version 1.0.0.0

Author: Eric Zimmerman ([email protected])
https://github.com/EricZimmerman/evtx

Command line: -f .\dicovery_4661_net_group_domain_admins_target.evtx --csv C:\Users\user\Downloads\ --csvf dicovery_4661_net_group_domain_admins_target.csv

CSV output will be saved to C:\Users\user\Downloads\dicovery_4661_net_group_domain_admins_target.csv

Maps loaded: 393

Processing C:\Users\user\Downloads\dicovery_4661_net_group_domain_admins_target.evtx...
C:\Users\user\Downloads\dicovery_4661_net_group_domain_admins_target.evtx is not an evtx file! Message: Invalid signature! Expected 'ElfFile' Skipping...

any help would be appreciated

thank you