gbk' codec can't decode byte 0xb0 in position 66: illegal multibyte sequence

This error message indicates that there is a problem decoding a byte in a string using the GBK codec. The byte in question is 0xb0, which is an illegal multibyte sequence in the GBK encoding.

Possible causes of this error could be:

- The input string contains characters or symbols that are not supported by the GBK encoding, such as characters from other languages or special symbols that are not part of the ASCII range.
- The input string is not properly encoded in GBK, or there are encoding errors that cause some bytes to be interpreted incorrectly.
- There is a bug or issue in the software or library that is attempting to decode the string using GBK.

To resolve this error, you may need to:

- Check the input string and make sure that it only contains characters that are supported by the GBK encoding. If there are any non-GBK characters, you may need to convert them to GBK or use a different encoding that supports them.
- Check the encoding of the input string and make sure that it is properly encoded in GBK. If there are any encoding errors, you may need to fix them before decoding the string.
- If you are using a library or software to decode the string, check the documentation and see if there are any known issues or bugs related to the GBK codec. You may need to update the library or use a different one if there are any issues.