I am using thewire_tool on my website. While I updated my plugins from Elgg2 to Elgg3, I found that on line 59 of thewire_tools/views/default/resources/thewire/autocomplete.php it still uses the removed function $tags_id = elgg_get_metastring_id('tags');

Cheers!

@seri_ng

tracking it under https://github.com/ColdTrick/thewire_tools/issues/40