possible fix for UnicodeDecodeError: 'utf8' codec can't decode byte

contents/winrm-exec.py

@@ -162,9 +162,9 @@
             sys.stderr.seek(lasterrorpos)
             errorread=session._clean_error_msg(sys.stderr.read())
             if isinstance(errorread, str):
-                realstdout.write(errorread)
+                realstderr.write(errorread)
             else:
-                realstdout.write(errorread.decode(charset))
+                realstderr.write(errorread.decode(charset))
             lasterrorpos = sys.stderr.tell()
         except Exception as e:
             traceback.print_exc(file=sys.stdout)
@@ -178,7 +178,7 @@
 sys.stderr = realstderr
 
 if tsk.e_std:
-    sys.stderr.write("Execution finished with the following error:\n %s" % tsk.e_std)
+    sys.stderr.write("Execution finished with the following error")
     sys.exit(1)
 else:
     sys.exit(tsk.stat)

contents/winrm_session.py

@@ -37,7 +37,7 @@ def run_ps(self, script, out_stream=None, err_stream=None):
     encoded script command
     """
     # must use utf16 little endian on windows
-    encoded_ps = b64encode(script.encode('utf_16_le')).decode()
+    encoded_ps = b64encode(script.encode('utf_16_le')).decode('ascii')
     rs = self.run_cmd('powershell -encodedcommand {0}'.format(encoded_ps),out_stream=out_stream, err_stream=err_stream)
 
     return rs
@@ -46,7 +46,7 @@ def run_ps(self, script, out_stream=None, err_stream=None):
 def _clean_error_msg(self, msg):
     #data=""
     if isinstance(msg, bytes):
-        msg = msg.decode('utf-8')
+        msg = msg.decode('utf-8', errors="ignore")
 
     if msg.startswith("#< CLIXML") or "<Objs Version=" in msg or "-1</PI><PC>" in msg:
         # for proper xml, we need to remove the CLIXML part