Unhandled exception (#bbd92049)

[sqlmapreporter]

Running version: 1.3.2.6#dev
Python version: 2.7.15+
Operating system: Linux-4.16.0-kali2-amd64-x86_64-with-Kali-kali-rolling-kali-rolling
Command line: sqlmap.py -u ******************************************************************** --os-pwn --random-agent
Technique: ERROR
Back-end DBMS: MySQL (fingerprinted)

Traceback (most recent call last):
  File "sqlmap.py", line 167, in main
    start()
  File "lib/core/decorators.py", line 47, in _
    result = f(*args, **kwargs)
  File "lib/controller/controller.py", line 666, in start
    action()
  File "lib/controller/action.py", line 157, in action
    conf.dbmsHandler.osPwn()
  File "plugins/generic/takeover.py", line 259, in osPwn
    self.pwn(goUdf)
  File "lib/takeover/metasploit.py", line 689, in pwn
    func()
  File "lib/takeover/metasploit.py", line 469, in _runMsfShellcodeRemoteViaSexec
    self.execCmd(cmd, silent=True)
  File "lib/takeover/abstraction.py", line 48, in execCmd
    self.webBackdoorRunCmd(cmd)
  File "lib/takeover/web.py", line 80, in webBackdoorRunCmd
    cmdUrl = "%s?cmd=%s" % (self.webBackdoorUrl, cmd)
UnicodeDecodeError: 'ascii' codec can't decode byte 0x89 in position 15: ordinal not in range(128)