error message during installation of running gunicorn-19.9.0 setup.py

Provider: local vmware host

System: Centos 7.6 ,x86_64 ,RAM 2G

Installation option:

OLS or Enterprise? OLS

Installing from official server or mirror server?
mirror server

Replace JS/CSS files to JS Delivr?
yes

Install Memcached extension for PHP?
yes

Install LiteSpeed Memcached?
yes

Install Memcached?
yes

Install Redis extension for PHP?
yes

Install Redis?
yes

Problem:

When I try to install cyberpanel, run the installation script as a single command :
sh <(curl https://cyberpanel.net/install.sh || wget -O - https://cyberpanel.net/install.sh)

it show error message below:

‘’’
Searching for gunicorn
Reading Links for gunicorn
Best match: gunicorn 19.9.0
Downloading https://files.pythonhosted.org/packages/47/52/68ba8e5e8ba251e54006a49441f7ccabca83b6bef5aedacb4890596c7911/gunicorn-19.9.0.tar.gz#sha256=fa2662097c66f920f53f70621c6c58ca4a3c4d3434205e608e121b5b3b71f4f3
Processing gunicorn-19.9.0.tar.gz
Writing /tmp/easy_install-8HKM03/gunicorn-19.9.0/setup.cfg
Running gunicorn-19.9.0/setup.py -q bdist_egg --dist-dir /tmp/easy_install-8HKM03/gunicorn-19.9.0/egg-dist-tmp-sEz1SS
/usr/lib64/python2.7/distutils/dist.py:267: UserWarning: Unknown distribution option: ‘python_requires’
warnings.warn(msg)
warning: no previously-included files matching ‘pycache’ found under directory ‘
warning: no previously-included files matching '
.py[co]’ found under directory ‘*’
File “build/bdist.linux-x86_64/egg/gunicorn/workers/_gaiohttp.py”, line 84
yield from self.wsgi.close()
^
SyntaxError: invalid syntax

File “/usr/lib/python2.7/site-packages/gunicorn-19.9.0-py2.7.egg/gunicorn/workers/_gaiohttp.py”, line 84
yield from self.wsgi.close()
^
SyntaxError: invalid syntax

Adding gunicorn 19.9.0 to easy-install.pth file
Installing gunicorn script to /usr/bin
Installing gunicorn_paster script to /usr/bin

Installed /usr/lib/python2.7/site-packages/gunicorn-19.9.0-py2.7.egg
Processing dependencies for gunicorn
Finished processing dependencies for gunicorn
‘’’

Try KVM or OpenVZ.