It looks like that person was using LE so you need to change the first instruction. It worked for me although you probably also need to go into system>add-ons>manage dependencies>urllib3> and turn off auto update as well so it doesn’t update again.
osmc@VeroV:~$ cd .kodi/addons/script.module.urllib3/lib
osmc@VeroV:~/.kodi/addons/script.module.urllib3/lib$ mv urllib3 urllib3.backup
osmc@VeroV:~/.kodi/addons/script.module.urllib3/lib$ wget https://github.com/urllib3/urllib3/archive/refs/tags/1.26.18.tar.gz
--2023-12-05 01:49:54-- https://github.com/urllib3/urllib3/archive/refs/tags/1.26.18.tar.gz
Resolving github.com (github.com)... 192.30.255.113
Connecting to github.com (github.com)|192.30.255.113|:443... connected.
HTTP request sent, awaiting response... 302 Found
Location: https://codeload.github.com/urllib3/urllib3/tar.gz/refs/tags/1.26.18 [following]
--2023-12-05 01:49:54-- https://codeload.github.com/urllib3/urllib3/tar.gz/refs/tags/1.26.18
Resolving codeload.github.com (codeload.github.com)... 192.30.255.120
Connecting to codeload.github.com (codeload.github.com)|192.30.255.120|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [application/x-gzip]
Saving to: '1.26.18.tar.gz'
1.26.18.tar.gz [ <=> ] 269.24K 1.71MB/s in 0.2s
2023-12-05 01:49:55 (1.71 MB/s) - '1.26.18.tar.gz' saved [275704]
osmc@VeroV:~/.kodi/addons/script.module.urllib3/lib$ tar xzvf 1.26.18.tar.gz
urllib3-1.26.18/
urllib3-1.26.18/.coveragerc
urllib3-1.26.18/.github/
urllib3-1.26.18/.github/CODEOWNERS
urllib3-1.26.18/.github/FUNDING.yml
urllib3-1.26.18/.github/ISSUE_TEMPLATE/
urllib3-1.26.18/.github/ISSUE_TEMPLATE/01_feature_request.md
urllib3-1.26.18/.github/ISSUE_TEMPLATE/02_bug_report.md
urllib3-1.26.18/.github/ISSUE_TEMPLATE/config.yml
urllib3-1.26.18/.github/PULL_REQUEST_TEMPLATE.md
urllib3-1.26.18/.github/workflows/
urllib3-1.26.18/.github/workflows/ci.yml
urllib3-1.26.18/.github/workflows/integration.yml
urllib3-1.26.18/.github/workflows/lint.yml
urllib3-1.26.18/.github/workflows/publish.yml
urllib3-1.26.18/.gitignore
urllib3-1.26.18/.pre-commit-config.yaml
urllib3-1.26.18/.readthedocs.yml
urllib3-1.26.18/CHANGES.rst
urllib3-1.26.18/CODE_OF_CONDUCT.md
urllib3-1.26.18/LICENSE.txt
urllib3-1.26.18/MANIFEST.in
urllib3-1.26.18/README.rst
urllib3-1.26.18/ci/
urllib3-1.26.18/ci/deploy.sh
urllib3-1.26.18/ci/run_tests.sh
urllib3-1.26.18/dev-requirements.txt
urllib3-1.26.18/docs/
urllib3-1.26.18/docs/Makefile
urllib3-1.26.18/docs/_static/
urllib3-1.26.18/docs/_static/banner.svg
urllib3-1.26.18/docs/_static/dark-logo.svg
urllib3-1.26.18/docs/advanced-usage.rst
urllib3-1.26.18/docs/conf.py
urllib3-1.26.18/docs/contributing.rst
urllib3-1.26.18/docs/images/
urllib3-1.26.18/docs/images/demo-button.png
urllib3-1.26.18/docs/images/favicon.png
urllib3-1.26.18/docs/images/learn-more-button.png
urllib3-1.26.18/docs/images/logo.png
urllib3-1.26.18/docs/images/logo.svg
urllib3-1.26.18/docs/index.rst
urllib3-1.26.18/docs/make.bat
urllib3-1.26.18/docs/reference/
urllib3-1.26.18/docs/reference/contrib/
urllib3-1.26.18/docs/reference/contrib/appengine.rst
urllib3-1.26.18/docs/reference/contrib/index.rst
urllib3-1.26.18/docs/reference/contrib/ntlmpool.rst
urllib3-1.26.18/docs/reference/contrib/pyopenssl.rst
urllib3-1.26.18/docs/reference/contrib/securetransport.rst
urllib3-1.26.18/docs/reference/contrib/socks.rst
urllib3-1.26.18/docs/reference/index.rst
urllib3-1.26.18/docs/reference/urllib3.connection.rst
urllib3-1.26.18/docs/reference/urllib3.connectionpool.rst
urllib3-1.26.18/docs/reference/urllib3.exceptions.rst
urllib3-1.26.18/docs/reference/urllib3.fields.rst
urllib3-1.26.18/docs/reference/urllib3.poolmanager.rst
urllib3-1.26.18/docs/reference/urllib3.request.rst
urllib3-1.26.18/docs/reference/urllib3.response.rst
urllib3-1.26.18/docs/reference/urllib3.util.rst
urllib3-1.26.18/docs/requirements.txt
urllib3-1.26.18/docs/sponsors.rst
urllib3-1.26.18/docs/user-guide.rst
urllib3-1.26.18/docs/v2-roadmap.rst
urllib3-1.26.18/dummyserver/
urllib3-1.26.18/dummyserver/__init__.py
urllib3-1.26.18/dummyserver/certs/
urllib3-1.26.18/dummyserver/certs/README.rst
urllib3-1.26.18/dummyserver/certs/cacert.key
urllib3-1.26.18/dummyserver/certs/cacert.pem
urllib3-1.26.18/dummyserver/certs/server.crt
urllib3-1.26.18/dummyserver/certs/server.key
urllib3-1.26.18/dummyserver/handlers.py
urllib3-1.26.18/dummyserver/proxy.py
urllib3-1.26.18/dummyserver/server.py
urllib3-1.26.18/dummyserver/testcase.py
urllib3-1.26.18/noxfile.py
urllib3-1.26.18/setup.cfg
urllib3-1.26.18/setup.py
urllib3-1.26.18/src/
urllib3-1.26.18/src/urllib3/
urllib3-1.26.18/src/urllib3/__init__.py
urllib3-1.26.18/src/urllib3/_collections.py
urllib3-1.26.18/src/urllib3/_version.py
urllib3-1.26.18/src/urllib3/connection.py
urllib3-1.26.18/src/urllib3/connectionpool.py
urllib3-1.26.18/src/urllib3/contrib/
urllib3-1.26.18/src/urllib3/contrib/__init__.py
urllib3-1.26.18/src/urllib3/contrib/_appengine_environ.py
urllib3-1.26.18/src/urllib3/contrib/_securetransport/
urllib3-1.26.18/src/urllib3/contrib/_securetransport/__init__.py
urllib3-1.26.18/src/urllib3/contrib/_securetransport/bindings.py
urllib3-1.26.18/src/urllib3/contrib/_securetransport/low_level.py
urllib3-1.26.18/src/urllib3/contrib/appengine.py
urllib3-1.26.18/src/urllib3/contrib/ntlmpool.py
urllib3-1.26.18/src/urllib3/contrib/pyopenssl.py
urllib3-1.26.18/src/urllib3/contrib/securetransport.py
urllib3-1.26.18/src/urllib3/contrib/socks.py
urllib3-1.26.18/src/urllib3/exceptions.py
urllib3-1.26.18/src/urllib3/fields.py
urllib3-1.26.18/src/urllib3/filepost.py
urllib3-1.26.18/src/urllib3/packages/
urllib3-1.26.18/src/urllib3/packages/__init__.py
urllib3-1.26.18/src/urllib3/packages/backports/
urllib3-1.26.18/src/urllib3/packages/backports/__init__.py
urllib3-1.26.18/src/urllib3/packages/backports/makefile.py
urllib3-1.26.18/src/urllib3/packages/backports/weakref_finalize.py
urllib3-1.26.18/src/urllib3/packages/six.py
urllib3-1.26.18/src/urllib3/poolmanager.py
urllib3-1.26.18/src/urllib3/request.py
urllib3-1.26.18/src/urllib3/response.py
urllib3-1.26.18/src/urllib3/util/
urllib3-1.26.18/src/urllib3/util/__init__.py
urllib3-1.26.18/src/urllib3/util/connection.py
urllib3-1.26.18/src/urllib3/util/proxy.py
urllib3-1.26.18/src/urllib3/util/queue.py
urllib3-1.26.18/src/urllib3/util/request.py
urllib3-1.26.18/src/urllib3/util/response.py
urllib3-1.26.18/src/urllib3/util/retry.py
urllib3-1.26.18/src/urllib3/util/ssl_.py
urllib3-1.26.18/src/urllib3/util/ssl_match_hostname.py
urllib3-1.26.18/src/urllib3/util/ssltransport.py
urllib3-1.26.18/src/urllib3/util/timeout.py
urllib3-1.26.18/src/urllib3/util/url.py
urllib3-1.26.18/src/urllib3/util/wait.py
urllib3-1.26.18/test/
urllib3-1.26.18/test/__init__.py
urllib3-1.26.18/test/appengine/
urllib3-1.26.18/test/appengine/__init__.py
urllib3-1.26.18/test/appengine/conftest.py
urllib3-1.26.18/test/appengine/test_gae_manager.py
urllib3-1.26.18/test/appengine/test_urlfetch.py
urllib3-1.26.18/test/benchmark.py
urllib3-1.26.18/test/conftest.py
urllib3-1.26.18/test/contrib/
urllib3-1.26.18/test/contrib/__init__.py
urllib3-1.26.18/test/contrib/duplicate_san.pem
urllib3-1.26.18/test/contrib/test_pyopenssl.py
urllib3-1.26.18/test/contrib/test_pyopenssl_dependencies.py
urllib3-1.26.18/test/contrib/test_securetransport.py
urllib3-1.26.18/test/contrib/test_socks.py
urllib3-1.26.18/test/port_helpers.py
urllib3-1.26.18/test/socketpair_helper.py
urllib3-1.26.18/test/test_collections.py
urllib3-1.26.18/test/test_compatibility.py
urllib3-1.26.18/test/test_connection.py
urllib3-1.26.18/test/test_connectionpool.py
urllib3-1.26.18/test/test_exceptions.py
urllib3-1.26.18/test/test_fields.py
urllib3-1.26.18/test/test_filepost.py
urllib3-1.26.18/test/test_no_ssl.py
urllib3-1.26.18/test/test_poolmanager.py
urllib3-1.26.18/test/test_proxymanager.py
urllib3-1.26.18/test/test_queue_monkeypatch.py
urllib3-1.26.18/test/test_request.py
urllib3-1.26.18/test/test_response.py
urllib3-1.26.18/test/test_retry.py
urllib3-1.26.18/test/test_retry_deprecated.py
urllib3-1.26.18/test/test_ssl.py
urllib3-1.26.18/test/test_ssltransport.py
urllib3-1.26.18/test/test_util.py
urllib3-1.26.18/test/test_wait.py
urllib3-1.26.18/test/tz_stub.py
urllib3-1.26.18/test/with_dummyserver/
urllib3-1.26.18/test/with_dummyserver/__init__.py
urllib3-1.26.18/test/with_dummyserver/test_chunked_transfer.py
urllib3-1.26.18/test/with_dummyserver/test_connectionpool.py
urllib3-1.26.18/test/with_dummyserver/test_https.py
urllib3-1.26.18/test/with_dummyserver/test_no_ssl.py
urllib3-1.26.18/test/with_dummyserver/test_poolmanager.py
urllib3-1.26.18/test/with_dummyserver/test_proxy_poolmanager.py
urllib3-1.26.18/test/with_dummyserver/test_socketlevel.py
osmc@VeroV:~/.kodi/addons/script.module.urllib3/lib$ mv urllib3-1.26.18/src/urllib3/ .
osmc@VeroV:~/.kodi/addons/script.module.urllib3/lib$ rm -r 1.26.18.tar.gz urllib3-1.26.18/
osmc@VeroV:~/.kodi/addons/script.module.urllib3/lib$ systemctl restart mediacenter
osmc@VeroV:~/.kodi/addons/script.module.urllib3/lib$