text: 
  
  TITLE
  ValueError: The tokens {'null'} are defined in the tokenizer's vocabulary, but not in the decoder's alphabet. Make sure to include {'null'} in the decoder's alphabet.
  
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  ### System Info
  
  ```shell
  Hi @patrickvonplaten I got the same error as you mentioned above. I did what you said but I still get an error like below. Can you please help?
  ValueError: The tokens {'null'} are defined in the tokenizer's vocabulary, but not in the decoder's alphabet. Make sure to include {'null'} in the decoder's alphabet.
  
  My alphabet.json:
  {"labels": ["", "", "", "\u2047", " ", "'", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "\u00e7", "\u00f6", "\u00fc", "\u011f", "\u0131", "\u015f"], "is_bpe": false}
  my vocab.json:
  {"[PAD]": 0, "": 1, "": 2, "[UNK]": 3, "|": 4, "'": 5, "a": 6, "b": 7, "c": 8, "d": 9, "e": 10, "f": 11, "g": 12, "h": 13, "i": 14, "j": 15, "k": 16, "l": 17, "m": 18, "n": 19, "o": 20, "p": 21, "q": 22, "r": 23, "s": 24, "t": 25, "u": 26, "v": 27, "w": 28, "x": 29, "y": 30, "z": 31, "ç": 32, "ö": 33, "ü": 34, "ğ": 35, "ı": 36, "ş": 37}
  my added_tokens.json:
  {}
  my special_tokens_map.json:
  {"bos_token": "null", "eos_token": "null", "unk_token": "[UNK]", "pad_token": "[PAD]"}
  my tokenizer_config.json:
  {"unk_token": "[UNK]", "bos_token": "null", "eos_token": "null", "pad_token": "[PAD]", "do_lower_case": false, "word_delimiter_token": "|", "replace_word_delimiter_char": " ", "special_tokens_map_file": null, "name_or_path": "model/checkpoint-6000", "tokenizer_class": "Wav2Vec2CTCTokenizer", "processor_class": "Wav2Vec2ProcessorWithLM"}
  ```
  
  
  ### Who can help?
  
  @patrickvonplaten 
  
  ### Information
  
  - [X] The official example scripts
  - [X] My own modified scripts
  
  ### Tasks
  
  - [X] An officially supported task in the `examples` folder (such as GLUE/SQuAD, ...)
  - [X] My own task or dataset (give details below)
  
  ### Reproduction
  
  Hi @patrickvonplaten I got the same error as you mentioned above. I did what you said but I still get an error like below. Can you please help?
  ValueError: The tokens {'null'} are defined in the tokenizer's vocabulary, but not in the decoder's alphabet. Make sure to include {'null'} in the decoder's alphabet.
  
  My alphabet.json:
  {"labels": ["", "", "", "\u2047", " ", "'", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "\u00e7", "\u00f6", "\u00fc", "\u011f", "\u0131", "\u015f"], "is_bpe": false}
  my vocab.json:
  {"[PAD]": 0, "": 1, "": 2, "[UNK]": 3, "|": 4, "'": 5, "a": 6, "b": 7, "c": 8, "d": 9, "e": 10, "f": 11, "g": 12, "h": 13, "i": 14, "j": 15, "k": 16, "l": 17, "m": 18, "n": 19, "o": 20, "p": 21, "q": 22, "r": 23, "s": 24, "t": 25, "u": 26, "v": 27, "w": 28, "x": 29, "y": 30, "z": 31, "ç": 32, "ö": 33, "ü": 34, "ğ": 35, "ı": 36, "ş": 37}
  my added_tokens.json:
  {}
  my special_tokens_map.json:
  {"bos_token": "null", "eos_token": "null", "unk_token": "[UNK]", "pad_token": "[PAD]"}
  my tokenizer_config.json:
  {"unk_token": "[UNK]", "bos_token": "null", "eos_token": "null", "pad_token": "[PAD]", "do_lower_case": false, "word_delimiter_token": "|", "replace_word_delimiter_char": " ", "special_tokens_map_file": null, "name_or_path": "model/checkpoint-6000", "tokenizer_class": "Wav2Vec2CTCTokenizer", "processor_class": "Wav2Vec2ProcessorWithLM"}
  
  ### Expected behavior
  
  ```shell
  Hi @patrickvonplaten I got the same error as you mentioned above. I did what you said but I still get an error like below. Can you please help?
  ValueError: The tokens {'null'} are defined in the tokenizer's vocabulary, but not in the decoder's alphabet. Make sure to include {'null'} in the decoder's alphabet.
  
  My alphabet.json:
  {"labels": ["", "", "", "\u2047", " ", "'", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "\u00e7", "\u00f6", "\u00fc", "\u011f", "\u0131", "\u015f"], "is_bpe": false}
  my vocab.json:
  {"[PAD]": 0, "": 1, "": 2, "[UNK]": 3, "|": 4, "'": 5, "a": 6, "b": 7, "c": 8, "d": 9, "e": 10, "f": 11, "g": 12, "h": 13, "i": 14, "j": 15, "k": 16, "l": 17, "m": 18, "n": 19, "o": 20, "p": 21, "q": 22, "r": 23, "s": 24, "t": 25, "u": 26, "v": 27, "w": 28, "x": 29, "y": 30, "z": 31, "ç": 32, "ö": 33, "ü": 34, "ğ": 35, "ı": 36, "ş": 37}
  my added_tokens.json:
  {}
  my special_tokens_map.json:
  {"bos_token": "null", "eos_token": "null", "unk_token": "[UNK]", "pad_token": "[PAD]"}
  my tokenizer_config.json:
  {"unk_token": "[UNK]", "bos_token": "null", "eos_token": "null", "pad_token": "[PAD]", "do_lower_case": false, "word_delimiter_token": "|", "replace_word_delimiter_char": " ", "special_tokens_map_file": null, "name_or_path": "model/checkpoint-6000", "tokenizer_class": "Wav2Vec2CTCTokenizer", "processor_class": "Wav2Vec2ProcessorWithLM"}
  ```
  