Unhandled exception (#3de976a3)

[sqlmapreporter]

Running version: 1.4.4.4#dev
Python version: 2.7.17
Operating system: Linux-5.4.0-kali2-amd64-x86_64-with-debian-kali-rolling
Command line: /usr/bin/sqlmap -r ******* --encoding=GBK --hex --sql-shell
Technique: ERROR
Back-end DBMS: Microsoft SQL Server (fingerprinted)

Traceback (most recent call last):
  File "sqlmap", line 215, in main
    start()
  File "/share/sqlmap/lib/core/decorators.py", line 75, in _
    result = f(*args, **kwargs)
  File "/share/sqlmap/lib/controller/controller.py", line 700, in start
    action()
  File "/share/sqlmap/lib/controller/action.py", line 192, in action
    conf.dbmsHandler.sqlShell()
  File "/share/sqlmap/plugins/generic/custom.py", line 108, in sqlShell
    output = self.sqlQuery(query)
  File "/share/sqlmap/plugins/generic/custom.py", line 53, in sqlQuery
    output = inject.getValue(query, fromUser=True)
  File "/share/sqlmap/lib/core/decorators.py", line 91, in _
    result = f(*args, **kwargs)
  File "/share/sqlmap/lib/core/decorators.py", line 75, in _
    result = f(*args, **kwargs)
  File "/share/sqlmap/lib/request/inject.py", line 450, in getValue
    value = errorUse(forgeCaseExpression if expected == EXPECTED.BOOL else query, dump)
  File "/share/sqlmap/lib/techniques/error/use.py", line 454, in errorUse
    value = _errorFields(expression, expressionFields, expressionFieldsList)
  File "/share/sqlmap/lib/techniques/error/use.py", line 247, in _errorFields
    output = NULL if emptyFields and field in emptyFields else _oneShotErrorUse(expressionReplaced, field)
  File "/share/sqlmap/lib/techniques/error/use.py", line 70, in _oneShotErrorUse
    retVal = hashDBRetrieve(expression, checkConf=True)
  File "/share/sqlmap/lib/core/common.py", line 4888, in hashDBRetrieve
    retVal = conf.hashDB.retrieve(_, unserialize) if kb.resumeValues and not (checkConf and any((conf.flushSession, conf.freshQueries))) else None
  File "/share/sqlmap/lib/utils/hashdb.py", line 79, in retrieve
    hash_ = HashDB.hashKey(key)
  File "/share/sqlmap/lib/utils/hashdb.py", line 71, in hashKey
    key = getBytes(key if isinstance(key, six.text_type) else repr(key))
  File "/share/sqlmap/lib/core/convert.py", line 259, in getBytes
    retVal = value.encode(encoding, errors)
UnicodeEncodeError: 'gbk' codec can't encode character u'\xa0' in position 45: illegal multibyte sequence