NFAuthenticationKey.py error in code

[s2ibu]

Hello :)

I get error in NFAuthenticationKey.py:

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/home/xxx/Downloads/NFAuthenticationKey.py:273: DeprecationWarning: invalid escape sequence '/'
json_str_replace = json_str_replace.encode().decode('unicode_escape') # Decode the string as unicode
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File NFAuthentication.key doesn't work. Python version 3.10.