Error when trying to do mkdocs serve

[franciscaGrandon]

Hi everyone!
I'm currently using the latest version released of the plugin (v1.0.4) and my mkdocs.yml file has this line inside the navigation part.

nav:
  - Home: index.md
  - API:
     - books_try1: '!include ./packages/cr_packages/cr-customer-booksuite/mkdocs.yml'
     - books_tr2: '*include ./packages/cr_packages/*/mkdocs.yml'

plugins:
  - monorepo
  - search:
      lang: en
  - mkdocstrings:

The problem is that is not working with any of the !include possibilities, I always get this same error:

INFO     -  Building documentation...
INFO     -  Cleaning site directory
INFO     -  The following pages exist in the docs directory, but are not included in the "nav"
            configuration:
              - keep_data_updated.md
              - workflow_deepdive.md
ERROR    -  Error reading page 'cr-customer-booksuite/index.md': 'NoneType' object has no
            attribute 'endswith'
Traceback (most recent call last):
  File "/opt/anaconda3/envs/c1wv2/bin/mkdocs", line 8, in <module>
    sys.exit(cli())
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs/__main__.py", line 181, in serve_command
    serve.serve(dev_addr=dev_addr, livereload=livereload, watch=watch, **kwargs)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs/commands/serve.py", line 63, in serve
    config = builder()
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs/commands/serve.py", line 58, in builder
    build(config, live_server=live_server, dirty=dirty)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs/commands/build.py", line 292, in build
    _populate_page(file.page, config, files, dirty)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs/commands/build.py", line 163, in _populate_page
    page = config['plugins'].run_event(
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs/plugins.py", line 102, in run_event
    result = method(item, **kwargs)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs_monorepo_plugin/plugin.py", line 71, in on_pre_page
    set_edit_url(config, page, self)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs_monorepo_plugin/edit_uri.py", line 105, in set_edit_url
    page.edit_url = edit_url.build()
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs_monorepo_plugin/edit_uri.py", line 98, in build
    if self.__has_repo():
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs_monorepo_plugin/edit_uri.py", line 85, in __has_repo
    page_config_file_yaml = self.__get_page_config_file_yaml()
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs_monorepo_plugin/edit_uri.py", line 82, in __get_page_config_file_yaml
    return self.__load_page_config_file(f)
  File "/opt/anaconda3/envs/c1wv2/lib/python3.8/site-packages/mkdocs_monorepo_plugin/edit_uri.py", line 68, in __load_page_config_file
    and not page_repo_url.endswith('/'):
AttributeError: 'NoneType' object has no attribute 'endswith'

I was reading some ways to address this problem, and found this two issues: #77 and backstage/mkdocs-techdocs-core#62

I think they are related to this error, but other than installing the v1.0.0 version, does anyone know a different way to fix this?

Thanks a lot in advance!