ASIN extraction can fail

[djdembeck]

2021-10-14 17:45:18,298 (151c30d4cb38) :  CRITICAL (agentkit:1018) - Exception in the search function of agent named 'Audnexus Agent', called with keyword arguments {'album': 'Training the Samurai Mind', 'openSubtitlesHash': 'dc5a1a661291dc1e', 'name': 'Training the Samurai Mind - A Bushido Sourcebook', 'artist': 'Thomas Cleary - translator/editor', 'title': None, 'filename': '%2Fdata%2Fmusic%2FAudiobooks%2FThomas%20Cleary%20-%20translatoreditor%2FTraining%20the%20Samurai%20Mind%2FTraining%20the%20Samurai%20Mind%20-%20A%20Bushido%20Sourcebook%2Em4b', 'plexHash': 'd3c40d24e4b3d7ae90e1178727c77f142d2599a5', 'duration': '29766296', 'id': '654615'} (most recent call last):
  File "/usr/lib/plexmediaserver/Resources/Plug-ins-e362dc1ee/Framework.bundle/Contents/Resources/Versions/2/Python/Framework/api/agentkit.py", line 1011, in _search
    agent.search(*f_args, **f_kwargs)
  File "/config/Library/Application Support/Plex Media Server/Plug-ins/Audnexus.bundle/Contents/Code/__init__.py", line 71, in search
    result = self.call_search_api(search_helper)
  File "/config/Library/Application Support/Plex Media Server/Plug-ins/Audnexus.bundle/Contents/Code/__init__.py", line 160, in call_search_api
    search_url = helper.build_url()
  File "/config/Library/Application Support/Plex Media Server/Plug-ins/Audnexus.bundle/Contents/Code/search_tools.py", line 223, in build_url
    match_asin = re.search(asin_regex, self.media.artist)
  File "/usr/lib/plexmediaserver/Resources/Python/python27.zip/re.py", line 146, in search
    return _compile(pattern, flags).search(string)
TypeError: expected string or buffer