Unable to index error when executing sudo bundle exec rake ts:rebuild

[thirumal1]

Hello,
I am trying to install vish on my Mac, by following the instructions and I am stuck at the step where it builds indexes (sudo bundle exec rake ts:rebuild) . I am getting below error.

indexing index 'audio_core'...
ERROR: index 'audio_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.068 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'audio'...
indexing index 'category_core'...
ERROR: index 'category_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.047 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'category'...
indexing index 'comment_core'...
ERROR: index 'comment_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.014 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'comment'...
indexing index 'document_core'...
ERROR: index 'document_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.039 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'document'...
indexing index 'embed_core'...
ERROR: index 'embed_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.013 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'embed'...
indexing index 'event_core'...
ERROR: index 'event_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.015 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'event'...
indexing index 'excursion_core'...
ERROR: index 'excursion_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.028 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'excursion'...
indexing index 'group_core'...
ERROR: index 'group_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.013 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'group'...
indexing index 'imscpfile_core'...
ERROR: index 'imscpfile_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.014 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'imscpfile'...
indexing index 'link_core'...
ERROR: index 'link_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.036 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'link'...
indexing index 'picture_core'...
ERROR: index 'picture_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.015 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'picture'...
indexing index 'post_core'...
ERROR: index 'post_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.016 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'post'...
indexing index 'remote_subject_core'...
ERROR: index 'remote_subject_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.013 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'remote_subject'...
indexing index 'scormfile_core'...
ERROR: index 'scormfile_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.014 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'scormfile'...
indexing index 'site_core'...
ERROR: index 'site_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.015 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'site'...
indexing index 'user_core'...
ERROR: index 'user_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.015 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'user'...
indexing index 'video_core'...
ERROR: index 'video_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.015 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'video'...
indexing index 'webapp_core'...
ERROR: index 'webapp_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.013 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'webapp'...
indexing index 'workshop_core'...
ERROR: index 'workshop_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.014 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'workshop'...
indexing index 'writing_core'...
ERROR: index 'writing_core': id is not a valid attribute name.
total 0 docs, 0 bytes
total 0.014 sec, 0 bytes/sec, 0.00 docs/sec
skipping non-plain index 'writing'...
total 0 reads, 0.000 sec, 0.0 kb/call avg, 0.0 msec/call avg
total 0 writes, 0.000 sec, 0.0 kb/call avg, 0.0 msec/call avg
Started successfully (pid 31045).

Thanks in advance
Please advise