Board Thread:Lua Help/@comment-3147293-20170114115439/@comment-4522253-20170114193712

As a note, your invocation error seems to be more related to passing a null value. I did not get the same error you are reporting.

However, I strongly suggest that you use Portable Infoboxes rather than Lua InfoboxBuilder, which is no longer supported. Additionally, the function you are building in Lua is native to Portable Infoboxes.