ansible unable to open shell

the Error messages list below:

2020-10-05 21:15:53,915 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:53,915 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:53,916 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:53,916 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:53,916 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:53,915 p=12887 u=deployer | creating new control socket for host XXXX:22 as user admin
2020-10-05 21:15:53,916 p=12887 u=deployer | control socket path is /home/deployer/.ansible/pc/8f7c800122
2020-10-05 21:15:53,916 p=12887 u=deployer | current working directory is /home/deployer/xunjian/wx-xunjian-5_11
2020-10-05 21:15:53,916 p=12887 u=deployer | using connection plugin network_cli

paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:52,706 p=12220 u=deployer | 12220 1601903752.70640: in VariableManager get_vars()
2020-10-05 21:15:52,706 p=12220 u=deployer | 12865 1601903752.70651: Loading ShellModule ‘csh’ from /usr/lib/python2.7/site-packages/ansible/plugins/shell/csh.py
2020-10-05 21:15:52,707 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:52,707 p=12220 u=deployer | 12865 1601903752.70737: Loading ShellModule ‘fish’ from /usr/lib/python2.7/site-packages/ansible/plugins/shell/fish.py
2020-10-05 21:15:52,707 p=12220 u=deployer | 12865 1601903752.70762: Loading ShellModule ‘powershell’ from /usr/lib/python2.7/site-packages/ansible/plugins/shell/powershell.py
2020-10-05 21:15:52,707 p=12220 u=deployer | 12865 1601903752.70778: Loading ShellModule ‘sh’ from /usr/lib/python2.7/site-packages/ansible/plugins/shell/sh.py
2020-10-05 21:15:52,708 p=12220 u=deployer | 12220 1601903752.70792: Loading FilterModule ‘core’ from /usr/lib/python2.7/site-packages/ansible/plugins/filter/core.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,708 p=12220 u=deployer | 12865 1601903752.70824: Loading ShellModule ‘sh’ from /usr/lib/python2.7/site-packages/ansible/plugins/shell/sh.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,708 p=12220 u=deployer | 12220 1601903752.70827: Loading FilterModule ‘ipaddr’ from /usr/lib/python2.7/site-packages/ansible/plugins/filter/ipaddr.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,708 p=12220 u=deployer | 12220 1601903752.70851: Loading FilterModule ‘json_query’ from /usr/lib/python2.7/site-packages/ansible/plugins/filter/json_query.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,708 p=12220 u=deployer | 12220 1601903752.70869: Loading FilterModule ‘mathstuff’ from /usr/lib/python2.7/site-packages/ansible/plugins/filter/mathstuff.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,708 p=12220 u=deployer | 12220 1601903752.70885: Loading FilterModule ‘network’ from /usr/lib/python2.7/site-packages/ansible/plugins/filter/network.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,709 p=12220 u=deployer | 12220 1601903752.70901: Loading FilterModule ‘urlsplit’ from /usr/lib/python2.7/site-packages/ansible/plugins/filter/urlsplit.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,709 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:52,709 p=12220 u=deployer | 12220 1601903752.70965: Loading TestModule ‘core’ from /usr/lib/python2.7/site-packages/ansible/plugins/test/core.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,709 p=12220 u=deployer | 12220 1601903752.70984: Loading TestModule ‘files’ from /usr/lib/python2.7/site-packages/ansible/plugins/test/files.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,710 p=12220 u=deployer | 12220 1601903752.71000: Loading TestModule ‘mathstuff’ from /usr/lib/python2.7/site-packages/ansible/plugins/test/mathstuff.py (found_in_cache=True, class_only=False)
2020-10-05 21:15:52,710 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:52,710 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:52,711 paramiko.hostkeys Unable to handle key of type ssh-ed25519
2020-10-05 21:15:52,711 p=12220 u=deployer | 12865 1601903752.71186: assigned :doc

Help
thanks for your valued time and looking forward to your response.