DRA746: source code download failed with repo

Hi, Expert.

As title description, 

I try to download DRA746 linux kernel & u-boot source, but I face some problems about repo

* SDK software what I use : 

https://www.ti.com/tool/PROCESSOR-SDK-DRA7X

* Reference install guide what I read: 

https://dr-download.ti.com/software-development/software-development-kit-sdk/MD-TquuJjoEg9/6.00.00.03/Processor_SDK_Linux_Automotive_Software_Developers_Guide_-_Texas_Instruments_Wiki.pdf

Check section as below

Commans as below :

host $ export PATH=${INSTALL_DIR}/bin:$PATH

host $ cd ${INSTALL_DIR}

host $ ./bin/fetch-sources.sh

and then I have some trouble.

gibbs@gibbs-MS-7D17:~/work/dra746/ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03$ export PATH=${INSTALL_DIR}/bin:$PATH
gibbs@gibbs-MS-7D17:~/work/dra746/ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03$ ./bin/fetch-sources.sh 
error: command 'sync' requires repo to be installed first.
        Use "repo init" to install it here.
error: command 'forall' requires repo to be installed first.
        Use "repo init" to install it here.
gibbs@gibbs-MS-7D17:~/work/dra746/ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03$ repo init
Downloading Repo source from https://gerrit.googlesource.com/git-repo
repo: warning: Invalid UTF-8 output:
cmd: ['git', 'tag', '-v', 'v2.32']
b'gpg: Signature made \xe5\xbb\xbf\xe5\xbb\xbf\xe4\xb8\x89\xe5\xb9\xb4\xe4\xb8\x89\xe6\x9c\x88\xe4\xb8\x80\xe6\x97\xa5 (\xe9\x80\xb1\xe4\xb8\x89) \xe4\xba\x8c\xe6\x99\x82\xe5\xbb\xbf\xe4\xb8\x89\xe5\x88\ngpg:                using DSA key 8BB9AD793E8E6153AF0F9A4416530D5E920F5C65\ngpg: Good signature from "Repo Maintainer <repo@android.kernel.org>" [unknown]\ngpg: WARNING: This key is not certified with a trusted signature!\ngpg:          There is no indication that the signature belongs to the owner.\nPrimary key fingerprint: 8BB9 AD79 3E8E 6153 AF0F  9A44 1653 0D5E 920F 5C65\n'

... A new version of repo (2.32) is available.
... You should upgrade soon:
    cp /home/gibbs/work/dra746/ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03/.repo/repo/repo /home/gibbs/work/dra746/ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03/bin/repo

fatal: manifest url is required.
gibbs@gibbs-MS-7D17:~/work/dra746/ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03$ echo ${INSTALL_DIR}
/home/gibbs/work/dra746/ti-processor-sdk-linux-automotive-dra7xx-evm-6.00.00.03

error message is "fatal: manifest url is required."

Does any one give me some suggestion to fix this problem?

Many Thanks

Gibbs