installing ansible-galaxy

Hi All,
I have an ansible control node, which is the version 2.10.17
i need to install fortigate collection by the command:
ansible-galaxy collection install fortinet.fortios

but i receive the error message (regardless what comes after ansible-galaxy, i kepp on getting the same error message)
ERROR! Unexpected Exception, this is probably a bug: cannot import name ‘CollectionRequirement’

the full traceback was:

Traceback (most recent call last):
File “/usr/local/bin/ansible-galaxy”, line 92, in
mycli = getattr(import(“ansible.cli.%s” % sub, fromlist=[myclass]), myclass)
File “/usr/local/lib/python3.6/site-packages/ansible/cli/galaxy.py”, line 24, in
from ansible.galaxy.collection import (
ImportError: cannot import name ‘CollectionRequirement’
is there any idea how to overcome it?

Hi All,
I have an ansible control node, which is the version 2.10.17

Delete or replace that software, and update to a contemporary release
of ansible-core. There were big structural changes when ansible was
renamed ansible-core, and the enormous bundle of ansible collection
modules was renamed ansible. And yes, it's confusing, but that's what
happened. You now need "ansible-core".

Thanks for your reply.
I did upgrade the ansible by:
sudo pip3 install ansible-core==2.15
and now the ansible-core is updated:
$ ansible --version
ansible [core 2.15.0]
config file = /home/ansible/.ansible.cfg
configured module search path = [‘/home/ansible/library’]
ansible python module location = /usr/local/lib/python3.9/site-packages/ansible
ansible collection location = /home/ansible/.ansible/collections:/usr/share/ansible/collections
executable location = /usr/local/bin/ansible
python version = 3.9.10 (main, Sep 23 2022, 00:00:00) [GCC 11.2.1 20220127 (Red Hat 11.2.1-9)] (/usr/bin/python3)
jinja version = 3.1.2
libyaml = True

after running the command:

ansible-galaxy collection install fortinet.fortios

i get the error message:
ERROR! Unknown error when attempting to call Galaxy at ‘https://galaxy.ansible.com/api/’: <urlopen error [Errno -2] Name or service not known>. <urlopen error [Errno -2] Name or service not known>

Sounds like a local dns resolution issue