Internal server error when retrieving the book list as XML

[adolski]

From an email from @srbbins:

This URL returns HTTP 500: https://book-tracker.library.illinois.edu/books.xml?ht=&ia=&in%5B%5D=ht&q=30112110879274

[gaurijo]

Adding some more context/how to produce the error locally:

• start rails server -> bin/rails server and go to http://localhost:3000
• log in with admin credentials
• Click on Export and choose MARCXML

The following error will come up:

And the same error comes up if you choose CSV