How to remove TypeError: '>=' not supported between instances of 'NoneType' and 'str'?

Please tell me how to solve this problem, when installing modules kivent namely the core.
Start applications at the command line these options: python build_ext install
Before this error, was the error error: Unable to find vcvarsall.bat she recovered install visual studio 2015
Get this error message:
[INFO ] [Logger ] Record log in C:\Users\User\.kivy\logs\kivy_18-10-09_4.txt
[INFO ] [Kivy ] v1.10.1
[INFO ] [Python ] v3.6.6 (v3.6.6:4cf1f54eb7, Jun 27 2018, 03:37:03) [MSC v.1900 64 bit (AMD64)]
Using distutils
running build_ext
 Traceback (most recent call last):
 File "", line 212, in <module>
 File "C:\Users\User\AppData\Local\Programs\Python\Python36\lib\distutils\", line 148, in setup
 File "C:\Users\User\AppData\Local\Programs\Python\Python36\lib\distutils\", line 955, in run_commands
 File "C:\Users\User\AppData\Local\Programs\Python\Python36\lib\distutils\", line 974, in run_command
 File "C:\Users\User\AppData\Local\Programs\Python\Python36\lib\distutils\command\", line 308, in run
 File "C:\Users\User\AppData\Local\Programs\Python\Python36\lib\distutils\", line 1031, in new_compiler
 return klass(None, dry_run, force)
 File "C:\Users\User\AppData\Local\Programs\Python\Python36\lib\distutils\", line 282, in __init__
 CygwinCCompiler.__init__ (self, verbose, dry_run, force)
 File "C:\Users\User\AppData\Local\Programs\Python\Python36\lib\distutils\", line 126, in __init__
 if self.ld_version >= "2.10.90":
 TypeError: '>=' not supported between instances of 'NoneType' and 'str'
March 12th 20 at 07:56
0 answer

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