Upgrading from 2.0 to 2.3 [Need advice]

My cyberpanel Current Version 2.0 Build 3

Hosted in Centos 7, I wish to upgrade to latest version.

When I follow the instruction to upgrade:

sh <(curl https://raw.githubusercontent.com/.../stable/preUpgrade.sh || wget -O - https://raw.githubusercontent.com/.../stable/preUpgrade.sh)

it stop halfway and I see this error:

WARNING: Running pip install with root privileges is generally not a good idea. Try pip3.6 install --user instead.

after that I follow again the instruction:

#pip3.6 install --user

it shows:

WARNING: Running pip install with root privileges is generally not a good idea. Try pip3.6 install --user instead.

You must give at least one requirement to install (see “pip help install”)

anyone experience this and able to share me some direction?
I see some say disable IPv6, I disable it via my VPS control panel, but still the same.

If I ignore the msg, the process just stop at this stage:

Collecting botocore==1.21.26
Downloading botocore-1.21.26-py3-none-any.whl (7.8 MB)
|██████▋ | 1.6 MB 22.5 MB/s eta 0:00Connection closed

Any suggestion what my next step?