Make exception message more informative

16 jobs for fix-mam-module-access-from-nbxmpp in 2 minutes and 32 seconds (queued for 64 minutes and 11 seconds)
Status Job ID Name Coverage
  Test
passed #12515
run-appdata

00:00:09

passed #12516
run-tests

00:02:11

failed #12502
run-appdata

canceled #12512
run-appdata

canceled #12509
run-appdata

failed #12507
run-appdata

canceled #12504
run-appdata

failed #12501
run-tests

canceled #12505
run-tests

canceled #12510
run-tests

canceled #12513
run-tests

failed #12508
run-tests

 
  Build
passed #12514
run-build

00:00:11

canceled #12511
run-build

canceled #12506
run-build

canceled #12503
run-build