`TypeError: not a string` after pressing to special characters use delete

[FANGOD]

今天（2023年6月29日）星期几为星期四。
USER: 而且4月6号是 星期四   #  --> 是{ }星, here is not space, after pressing to special characters use delete, throws an error

│ py:316 in _EncodeAsPieces                                                                        │
│                                                                                                  │
│    313 │   │   return _sentencepiece.SentencePieceProcessor__EncodeAsIds(self, text, enable_sam  │
│    314 │                                                                                         │
│    315 │   def _EncodeAsPieces(self, text, enable_sampling, nbest_size, alpha, add_bos, add_eos  │
│ ❱  316 │   │   return _sentencepiece.SentencePieceProcessor__EncodeAsPieces(self, text, enable_  │
│    317 │                                                                                         │
│    318 │   def _EncodeAsSerializedProto(self, text, enable_sampling, nbest_size, alpha, add_bos  │
│    319 │   │   return _sentencepiece.SentencePieceProcessor__EncodeAsSerializedProto(self, text  │
╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
TypeError: not a string

After pressing to special characters use delete, throws an error.