'utf-8' codec can't decode byte 0x87 in position 10: invalid start byte

This error message usually occurs when trying to decode a string that contains characters that are not valid Unicode characters. The byte 0x87 is a non-ASCII character that cannot be decoded using the UTF-8 encoding.

To fix this error, you can try the following solutions:

1. Use a different encoding: If the string is encoded using a different encoding, you can try decoding it using that encoding instead of UTF-8.

2. Replace the non-ASCII characters: If the non-ASCII characters are not important, you can remove them or replace them with valid Unicode characters.

3. Use the correct encoding: If the string is encoded using a specific encoding, make sure to use the correct encoding when decoding it.

4. Ignore errors: You can also ignore the errors and continue with the decoding process by using the errors='ignore' parameter when decoding the string. However, this may result in loss of information.