Do you have ~/.sage/ directory?
If yes, could you rename it to something else and try again?
Thanks. 

On Sunday, November 5, 2017 at 12:48:06 AM UTC, Lee Duke wrote:
>
>
> I am running Fedora 26. The system is uo-to-date. I downloaded Sage 8.0 
> source and compiled it following the directions provided on the Sage 
> website. The system compiled and was made with no errors. When I enter 
> "notebook()" I get:
>
>  ./sage
> ┌────────────────────────────────────────────────────────────────────┐
> │ SageMath version 8.0, Release Date: 2017-07-21                     │
> │ Type "notebook()" for the browser-based notebook interface.        │
> │ Type "help()" for help.                                            │
> └────────────────────────────────────────────────────────────────────┘
> sage: notebook()
> ---------------------------------------------------------------------------
> OSError                                   Traceback (most recent call last)
> <ipython-input-1-3728cb3d7c7d> in <module>()
> ----> 1 notebook()
>
> /home/duke/sage-8.0/src/sage/misc/lazy_import.pyx in 
> sage.misc.lazy_import.LazyImport.__call__ 
> (/home/duke/sage-8.0/src/build/cythonized/sage/misc/lazy_import.c:3559)()
>     352             True
>     353         """
> --> 354         return self.get_object()(*args, **kwds)
>     355 
>     356     def __repr__(self):
>
> /home/duke/sage-8.0/local/lib/python2.7/site-packages/sagenb/notebook/notebook_object.pyc
>  
> in __call__(self, *args, **kwds)
>     241     """
>     242     def __call__(self, *args, **kwds):
> --> 243         return self.notebook(*args, **kwds)
>     244 
>     245     notebook = run_notebook.notebook_run
>
> /home/duke/sage-8.0/local/lib/python2.7/site-packages/sagenb/notebook/run_notebook.pyc
>  
> in notebook_run(self, directory, port, interface, port_tries, secure, 
> reset, accounts, openid, server_pool, ulimit, timeout, doc_timeout, upload, 
> automatic_login, start_path, fork, quiet, server, profile, subnets, 
> require_login, open_viewer, address)
>     529     # if none use defaults
>     530 
> --> 531     nb = notebook.load_notebook(directory)
>     532 
>     533     directory = nb._dir
>
> /home/duke/sage-8.0/local/lib/python2.7/site-packages/sagenb/notebook/notebook.pyc
>  
> in load_notebook(dir, interface, port, secure, user_manager)
>    1832 
>    1833     dir = make_path_relative(dir)
> -> 1834     nb = Notebook(dir)
>    1835     nb.interface = interface
>    1836     nb.port = port
>
> /home/duke/sage-8.0/local/lib/python2.7/site-packages/sagenb/notebook/notebook.pyc
>  
> in __init__(self, dir, user_manager)
>     170 
>     171         # Store / Refresh public worksheets
> --> 172         for id_number in 
> os.listdir(self.__storage._abspath(self.__storage._user_path("pub"))):
>     173             if id_number.isdigit():
>     174                 a = "pub/"+str(id_number)
>
> OSError: [Errno 2] No such file or directory: 
> '/home/duke/.sage/sage_notebook.sagenb/home/pub'
>
>

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