tinymce: Reverse for 'tinymce.views.spell_check'

[scha...@gmail.com]

Hi All,
I'm on Django 1.10.5 using django-tinymce 2.6.0.
Before upgrading to Django 1.10.5 I did not have any problems, but now I get an error:

NoReverseMatch at /registry/preview/4

Reverse for 'tinymce.views.spell_check' with arguments '()' and keyword arguments '{}' not found. 0 pattern(s) tried: []

In a model the HTMLField is used like:

htmlpage = HTMLField(blank=True, null=True)

In the urls.py the urls of tinymce is included:

url(r'^tinymce/', include(tinymce.urls)),

and in the settings.py the configuration is like:

TINYMCE_DEFAULT_CONFIG = {
        'theme': 'advanced',
        'theme_advanced_buttons1': 'bold, italic, underline, bullist, numlist, forecolor, spellcheck',
        'theme_advanced_path': False,
        'relative_urls': False,
        'width': '100%',
        'height': "960px",
        'content_css': 'static/css/mail_custom.css',
        'browser_spellcheck': True,
        }

TINYMCE_SPELLCHECKER = True

and of course it is added to the installed apps.

Do you have a hint?
Thanks
schaf