I downloaded SageMath VM for Windows from sagemath

If I try an interact example:

@interact

def _(n=slider(1,20, step_size=1)):

print(factorial(n))

it does not work unless I do first:

from
sagenb.notebook.interact import *

what is nowhere in the documentation by the way. Even so, I need to call the function first (what in SageMathCell is not needed):

_()

I get the error:

TypeError

Traceback (most recent call last)
<ipython-input-65-02a00410cc9d> in
<module>()
----> 1 _()

<ipython-input-64-067de41a741b> in
_(n)
1 @interact
2 def _(n=slider(Integer(1),Integer(20), step_size=Integer(1))):
----> 3 print(factorial(n))

/home/sage/sage-7.2/src/sage/symbolic/function.pyx
in
sage.symbolic.function.GinacFunction.__call__
(/home/sage/sage-7.2/src/build/cythonized/sage/symbolic/function.cpp:9536)()
819 (0, Integer Ring)
820 """
--> 821 res = super(GinacFunction,
self).__call__(*args, **kwds)
822
823 # Convert to Integer if the output was of type "int" and
any of

/home/sage/sage-7.2/src/sage/symbolic/function.pyx
in
sage.symbolic.function.BuiltinFunction.__call__
(/home/sage/sage-7.2/src/build/cythonized/sage/symbolic/function.cpp:11161)()
970 res = self._evalf_try_(*args)
971 if res is None:
--> 972 res = super(BuiltinFunction, self).__call__(
973 *args, coerce=coerce, hold=hold)
974

/home/sage/sage-7.2/src/sage/symbolic/function.pyx
in
sage.symbolic.function.Function.__call__
(/home/sage/sage-7.2/src/build/cythonized/sage/symbolic/function.cpp:6754)()
469 if callable(method):
470 return method()
--> 471 raise TypeError("cannot coerce arguments:
%s" % (err))
472
473 else: # coerce == False

TypeError: cannot coerce arguments: no
canonical coercion from <type 'instance'=""> to Symbolic Ring

But in SageMathCell it works.

If I change print(factorial(n)) for print(type(n)) when I call _() I get:

<type 'instance'>

Again If I just call print(n) I get:

Slider: None [1--|1|---20]

I understand that this means that n (the slider) is not a number. But again in SageMathCell it works.

UPDATE:

I am using Sage-7.2-ova virtual machine image for Windows (a dedicated CentOS machine) (unfortunately I have no karma to post links) in a Windows 10 VM under VMware Workstation 12. Player.

The machine has an integrated Chromium browser, the VM is completely off the shelf, just open the OVA and the machine is running. The only configs I did ~~were ~~were:
* for the keyboard (ABNT2 ~~BR) and ~~BR);
* to access the web server from the host;
* to install VMWare tools and get a shared folder with the host

but the error was there before all that.

And the error is not about the browser, the interpreter obviously do not accept the commands, the stack trace is very consistent about that, as the SageMathCell site (no links again because of my karma) was a different version (at least on the interact package).

IMPORTANT:

I am not using sage on command line. I am using on Sage Notebook on Jupyter via browser (not using aPython kernel, but Sage 7.2 kernel), by clicking New Notebook.

On command the line I have the exact same behavior.