Add gif to Indigo Theme

I add some gif to indigo theme
then do tutor config save
and gets:

tutor config save
Configuration saved to /***/tutor-olive/tutor/config.yml
Error loading template indigo/lms/static/images/support_icon_100.gif
Traceback (most recent call last):
  File "/***/.pyenv/versions/tutor-olive/bin/tutor", line 33, in <module>
    sys.exit(load_entry_point('tutor', 'console_scripts', 'tutor')())
  File "/***/tutor-olive/tutor/tutor/commands/cli.py", line 26, in main
    cli()  # pylint: disable=no-value-for-parameter
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/click/core.py", line 1130, in __call__
    return self.main(*args, **kwargs)
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/click/core.py", line 1055, in main
    rv = self.invoke(ctx)
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/click/core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/click/core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/click/core.py", line 760, in invoke
    return __callback(*args, **kwargs)
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/click/decorators.py", line 38, in new_func
    return f(get_current_context().obj, *args, **kwargs)
  File "/***/tutor-olive/tutor/tutor/commands/config.py", line 137, in save
    env.save(context.root, config)
  File "/***/tutor-olive/tutor/tutor/env.py", line 322, in save
    save_all_from(src, os.path.join(root_env, dst), config)
  File "/***/tutor-olive/tutor/tutor/env.py", line 340, in save_all_from
    renderer.render_all_to(dst, prefix.replace(os.sep, "/"))
  File "/***/tutor-olive/tutor/tutor/env.py", line 207, in render_all_to
    rendered = self.render_template(template_name)
  File "/***/tutor-olive/tutor/tutor/env.py", line 188, in render_template
    template = self.environment.get_template(template_name)
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/jinja2/environment.py", line 1010, in get_template
    return self._load_template(name, globals)
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/jinja2/environment.py", line 969, in _load_template
    template = self.loader.load(self, name, self.make_globals(globals))
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/jinja2/loaders.py", line 126, in load
    source, filename, uptodate = self.get_source(environment, name)
  File "/***/.pyenv/versions/3.8.16/envs/tutor-olive/lib/python3.8/site-packages/jinja2/loaders.py", line 204, in get_source
    contents = f.read().decode(self.encoding)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xf7 in position 10: invalid start byte

After deleting this or another git tutor config works fine.
How fix it?