Module talk:Citation/CS1

Lua error in Module:Citation/CS1/Identifiers at line 1014: attempt to compare nil with number., Wikidata Q36472504
The References section of Research, Education and Economic Growth currently contains 8 Wikidata references, one of which produces the following error:


 * Lua error in Module:Citation/CS1/Identifiers at line 1014: attempt to compare nil with number., Wikidata Q36472504



The other 7 work find. I asked about this on Project chat and got the following suggestions:


 * Module:Citation/CS1 here came from w:Module:Citation/CS1 in 2018. Supposedly that is the master copy. Testing there, it works too.
 * Maybe a new import from w: is needed at wikiversity. In any case, Module:Citation/CS1 doesn't seem to be maintained here. --- Jura 07:34, 19 August 2020 (UTC)
 * Some configuration (namely a "handler for PMC") is missing or not properly set on Wikiversity. This should help you if you seek help from the authors of the modules. --Matěj Suchánek 07:56, 19 August 2020 (UTC)


 * Might you be able to fix this? Thanks, DavidMCEddy (discuss • contribs) 13:48, 19 August 2020 (UTC)


 * Thanks for the suggestion. How can I find the authors of the modules?  DavidMCEddy (discuss • contribs) 03:27, 23 August 2020 (UTC)
 * It looks quite complex to trace. The lua error is raised from Module:Citation/CS1/Identifiers, a submodule of Module:Citation/CS1, which per its history here was imported from enwiki. So posting on its enwiki's talk page can be the place to ask for help.
 * Anyway, another look into this lead me to Module:Citation/CS1/Configuration, specifically to  (line 1560), where the field   is expected but is missing. I have no idea what value for it is appropriate, though. --Matěj Suchánek (discuss • contribs) 18:38, 23 August 2020 (UTC)


 * Thanks. I posted essentially this question to Module talk:Citation/CS1/Identifiers, pinging a couple of people listed in "history" for that page.  DavidMCEddy (discuss • contribs) 20:00, 23 August 2020 (UTC)