The application raised an exception with the message:
link: contract violation expected: stringish? given: '(img ((src "images/tfl-book-cover.gif"))) in: the 1st argument of (->* (stringish?) (stringish? #:class stringish?) tagged-xexpr?) contract from: (function link) blaming: /Users/mb/git/bpt/pollen-require/bpt-elements.rkt at: /Users/mb/git/bpt/pollen-require/bpt-elements.rkt:44.18
Stack trace:
raise-blame-error16 at: line 143, column 0, in file /Users/mb/git/racket/racket/collects/racket/contract/private/blame.rkt <unknown procedure> at: line 1570, column 30, in file /Users/mb/git/racket/racket/collects/racket/private/kw.rkt [running body] at: line #f, column #f, in file (submod /Users/mb/git/bpt/how-to-pay-for-this-book.html.pd pollen-inner) [traversing imports] at: line #f, column #f, in file /Users/mb/git/bpt/how-to-pay-for-this-book.html.pd find-in-main at: <unknown location> with-output-to-string at: line 125, column 0, in file /Users/mb/git/racket/racket/collects/racket/port.rkt core112 at: <unknown location> loop at: line 53, column 19, in file /Users/mb/git/racket/racket/collects/racket/private/map.rkt route-default at: line 206, column 0, in file /Users/mb/git/pollen/server-routes.rkt <unknown procedure> at: line 58, column 2, in file /Users/mb/git/racket/pkgs/web-server-pkgs/web-server-lib/web-server/dispatchers/dispatch-servlets.rkt <unknown procedure> at: line 112, column 8, in file /Users/mb/git/racket/pkgs/web-server-pkgs/web-server-lib/web-server/private/dispatch-server-unit.rkt