Commits on Jul 6, 2023

1. fix: UnboundLocalError: local variable 'local_server' referenced befo… …

   …re assignment
   
   In Oct. 2022 gyb worked fine on a Windows 10 system. Today I got 
   ```
   UnboundLocalError: local variable 'local_server' referenced before assignment
   ```
   This PR fixes the issue. Surprisingly, it took 840 ports to find one that would work:
   ```
   ...
   839: 127.0.0.1:8918: [WinError 10013] An attempt was made to access a socket in a way forbidden by its access permissions
   840: 127.0.0.1:8919: [WinError 10013] An attempt was made to access a socket in a way forbidden by its access permissions
   
   Go to the following link in your browser:
   
           https://gyb-shortn.jaylee.us/example
   ```

   

   rasa authored Jul 6, 2023
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