TemplateSyntaxError 'simple_translation_tags' is not a valid tag library

[zypro]

Django Version: 1.8.18

TemplateSyntaxError
'simple_translation_tags' is not a valid tag library: Template library simple_translation_tags not found, tried django.templatetags.simple_translation_tags,djangocms_admin_style.templatetags.simple_translation_tags,django.contrib.admin.templatetags.simple_translation_tags,django.contrib.staticfiles.templatetags.simple_translation_tags,cms.templatetags.simple_translation_tags,menus.templatetags.simple_translation_tags,sekizai.templatetags.simple_translation_tags,treebeard.templatetags.simple_translation_tags,djangocms_text_ckeditor.templatetags.simple_translation_tags,filer.templatetags.simple_translation_tags,easy_thumbnails.templatetags.simple_translation_tags,djangocms_snippet.templatetags.simple_translation_tags
python 2.7.13

Package simple-translation is installed.

[Tyrdall]

@zypro Hi. This app hasn't been used for years. I'm afraid there's a lot of deprecated stuff in it.