[dunhill]

Hello people when I want to install the plugin I get the following error.

calibre, version 4.18.0
ERROR: Excepción no considerada: <b>ImportError</b>:cannot import name ViewerPlugin

calibre 4.18 [64bit] embedded-python: True is64bit: True
Windows-10-10.0.18362-SP0 Windows ('64bit', 'WindowsPE')
('Windows', '10', '10.0.18362')
Python 2.7.16+
Windows: ('10', '10.0.18362', 'SP0', u'Multiprocessor Free')
Interface language: es
Successfully initialized third party plugins: Gather KFX-ZIP (from KFX Input) (1, 32, 0) && DeDRM (6, 6, 3) && K4PC, K4Mac, Mobi DeDRM (0, 1, 9) && K4PC, K4Mac, Kindle Mobi and Topaz DeDRM (0, 3, 5) && Package KFX (from KFX Input) (1, 32, 0) && Resize Cover (1, 0, 2) && Find Duplicates (1, 6, 9) && LanguageTool (0, 1, 0) && Sum Column (0, 3, 0) && Search The Internet (1, 7, 6) && Reading List (1, 6, 7) && Goodreads More Tags (1, 1, 0) && Quality Check (1, 9, 11) && User Category (1, 5, 4) && Goodreads_Rating (3, 0, 0) && Job Spy (1, 0, 183) && Wikidata (1, 3, 0) && BIBLIOETECA (0, 3, 0) && EpubMerge (2, 9, 0) && Extract ISBN (1, 4, 4) && Actualizador Biblioteca EPG (1, 6, 0) && F_rating (3, 2, 0) && Barnes & Noble (1, 2, 15) && BookFusion Plugin (0, 4, 1) && Count Pages (1, 9, 0) && KFX metadata reader (from KFX Input) (1, 32, 0) && KFX Input (1, 32, 0) && Goodreads Sync (1, 14, 2) && View Manager (1, 5, 6) && Goodreads (1, 4, 0)
Traceback (most recent call last):
File "site-packages\calibre\gui2\preferences\plugins.py", line 319, in add_plugin
File "site-packages\calibre\customize\ui.py", line 472, in add_plugin
File "site-packages\calibre\customize\ui.py", line 61, in load_plugin
File "site-packages\calibre\customize\zipplugin.py", line 201, in load
File "site-packages\polyglot\builtins.py", line 186, in reload
File "site-packages\calibre\customize\zipplugin.py", line 185, in load_module
File "calibre_plugins.tts_ebook_viewer.__init__", line 11, in <module>
ImportError: cannot import name ViewerPlugin