The G2\wotd() function uses taxonomy_node_get_terms() to find the terms associated to the node if G2\VARWOTDTERMS is set.
However, this function no longer exists in D7, and the node always contains the attached taxonomy_term_reference fields since it has been loaded from node_load() just above. The option and associated code should be removed, since they no longer serve any purpose.
Writeup by DamZ about the removal of taxonomy_node_get_terms(): http://drupal.org/node/978242#comment-3748214
Fixed
1.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
That feature cannot reasonably be implemented on D7: see the explanation on the summary.
Use the D9/D10 version these days.
Automatically closed - issue fixed for 2 weeks with no activity.