Exception occurred:
  File "/opt/hostedtoolcache/Python/3.7.9/x64/lib/python3.7/site-packages/sphinx/builders/html/__init__.py", line 1039, in <lambda>
    ctx['css_files'].sort(key=lambda js: js.priority)
AttributeError: 'str' object has no attribute 'priority'
The full traceback has been saved in /tmp/sphinx-err-z6ie2z11.log, if you want to report the issue to the developers.
Please also report this if it was a user error, so that a better error message can be provided next time.
A bug report can be filed in the tracker at <https://github.com/sphinx-doc/sphinx/issues>. Thanks!
make: *** [html] Error 2
Makefile:46: recipe for target 'html' failed

        # Start the process
        try:
>           hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
                                     # no special security
                                     None, None,
                                     int(not close_fds),
                                     creationflags,
                                     env,
                                     cwd,
                                     startupinfo)
E                                    FileNotFoundError: [WinError 2] The system cannot find the file specified

C:\Miniconda3\envs\test-environment\lib\subprocess.py:1307: FileNotFoundError