Key Error message: after install 9.7

getting error message listed below.. when attempting to open a book msg started after i installed version [9.7] on 11/23
help! i have no idea of what to do. i tried to reinstall to correct error but it didn't work


Traceback (most recent call last):
File "site-packages\calibre\gui2\viewer\documentview.py", line 822, in load_finished
File "site-packages\calibre\gui2\viewer\documentview.py", line 179, in load_javascript_libraries
File "site-packages\calibre\gui2\viewer\javascript.py", line 79, in __call__
File "site-packages\calibre\gui2\viewer\javascript.py", line 72, in get
File "site-packages\calibre\utils\resources.py", line 101, in compiled_coffeescript
File "site-packages\calibre\utils\zipfile.py", line 980, in read
File "site-packages\calibre\utils\zipfile.py", line 1008, in open
File "site-packages\calibre\utils\zipfile.py", line 970, in getinfo
KeyError: "There is no item named u'ebooks.oeb.display.extract.js' in the archive"