Can't Delete an Invoice or a line Item

Anytime I try to delete a line item, or an invoice I get presented with a 404 error page. I think the issue has to do with the invoice ID’s and not founding the item correctly.

Yes - same issue here with 1.5.6.

404 on page domain.com/invoices/delete/invoicenumber

Me too.
1.5.6 404 page when trying to delete anything.
Css of the delete button sees bit broken.

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