Yocto syncing problem

I followed instruction from [Yocto Project User Guide | RUBIK Pi Documentation]( in attempt to sync a Yocto Rubik Pi build. When I ran “repo init -u GitHub - rubikpi-ai/rubikpi-manifest: RUBIK Pi Yocto project manifest file. · GitHub -b qcom-linux-kirkstone -m rubikpi-6.6.52-QLI.1.3-Ver.1.2_qim-product-sdk-1.1.2.xml”, I got below fatal error and specifying no-repo-verify argument does not help.
fatal: branch ‘repo-1’ has not been signed
fatal: cloning the git-repo repository failed, will remove ‘.repo/repo’

Suggestoin is highly appreciated

Based on the log, this appears to be an issue with the repo tool. We recommend referring to the instructions in the GitHub - rubikpi-ai/rubikpi-manifest: RUBIK Pi Yocto project manifest file. · GitHub to reinstall the repo tool and configure your environment.
Additionally, the manifest you selected (rubikpi-6.6.52-QLI.1.3-Ver.1.2_qim-product-sdk-1.1.2.xml) is relatively old. The latest version is currently rubikpi-6.6.97-QLI.1.6-Ver.1.3_qim-product-sdk-2.1.1.xml—we suggest using the latest release for your development and testing.