Unhandled exception (#fa33b853) #2818

sqlmap version: 1.1.12.6#dev
Python version: 2.7.14
Operating system: posix
Command line: sqlmap.py -u ******************
Technique: None
Back-end DBMS: None

Traceback (most recent call last):
  File "sqlmap.py", line 157, in main
    start()
  File "lib/controller/controller.py", line 396, in start
    if not checkConnection(suppressOutput=conf.forms) or not checkString() or not checkRegexp():
  File "lib/controller/checks.py", line 1507, in checkConnection
    page, headers, _ = Request.queryPage(content=True, noteResponseTime=False)
  File "lib/request/connect.py", line 1233, in queryPage
    page, headers, code = Connect.getPage(url=uri, get=get, post=post, method=method, cookie=cookie, ua=ua, referer=referer, host=host, silent=silent, auxHeaders=auxHeaders, response=response, raise404=raise404, ignoreTimeout=timeBasedCompare)
  File "lib/request/connect.py", line 393, in getPage
    value = unicodeencode(value, kb.pageEncoding)
  File "lib/core/convert.py", line 134, in unicodeencode
    retVal = value.encode(encoding or UNICODE_ENCODING)
LookupError: unknown encoding: iso-8859-1