Leaf Setup error : Invalid Signature

I am getting the following error when execute the command “leaf setup wp76xxstable -p swi-wp76_4.0.0”:

W: GPG error: http://updatesite.sierrawireless.com/developerStudio3/debian release/ InRelease: The following signatures were invalid: B8FE1028C4B6273DDDD9874EBB7E31ABF32351C8
E: The repository ‘http://updatesite.sierrawireless.com/developerStudio3/debian release/ InRelease’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
Error during installation: Error during install step for swi-verify-aptdeps_1.1.190109 (command returned 100)
ERROR:

  • Profile provisioning interrupted*
    CAUSED BY:
  • Error during install step for swi-verify-aptdeps_1.1.190109 (command returned 100)*

Kindly, help resolve this.

Regards,
Devaiah

@devaiah, what is your leaf version please? can you create another workspace and starting from scratch?