error after upgrading to ubuntu 15.04

[ssc1478]

Hello,

I just upgraded my ubuntu laptop to 15.04 and get the following error
(pasted below) when launching gnucash.  Can you please tell me what I need
to do to correct this?   Thank you very much!!

Phil

phil at remus:~$ gnucash
Backtrace:
In ice-9/boot-9.scm:
 157: 16 [catch #t #<catch-closure a18d680> ...]
In unknown file:
   ?: 15 [apply-smob/1 #<catch-closure a18d680>]
In ice-9/boot-9.scm:
3597: 14 [process-use-modules (((gnucash price-quotes)))]
 702: 13 [map #<procedure a09c980 at ice-9/boot-9.scm:3597:25 (mif-args)>
((#))]
3598: 12 [#<procedure a09c980 at ice-9/boot-9.scm:3597:25 (mif-args)> (#)]
2864: 11 [resolve-interface (gnucash price-quotes) #:select ...]
2789: 10 [#<procedure a1401f0 at ice-9/boot-9.scm:2777:4 (name #:optional
autoload version #:key ensure)> # ...]
3065: 9 [try-module-autoload (gnucash price-quotes) #f]
2401: 8 [save-module-excursion #<procedure b11c8e8 at
ice-9/boot-9.scm:3066:17 ()>]
3085: 7 [#<procedure b11c8e8 at ice-9/boot-9.scm:3066:17 ()>]
In unknown file:
   ?: 6 [primitive-load-path "gnucash/price-quotes" ...]
In gnucash/price-quotes.scm:
  41: 5 [#<procedure b12e720 ()>]
In ice-9/boot-9.scm:
3597: 4 [process-use-modules (((www main)))]
 702: 3 [map #<procedure a09c980 at ice-9/boot-9.scm:3597:25 (mif-args)>
((#))]
3598: 2 [#<procedure a09c980 at ice-9/boot-9.scm:3597:25 (mif-args)> ((www
main))]
2867: 1 [resolve-interface (www main) #:select ...]
In unknown file:
   ?: 0 [scm-error misc-error #f "~A ~S" ("no code for module" (www main))
#f]

ERROR: In procedure scm-error:
ERROR: no code for module (www main)