In a vanilla 17.11.03 installation with Plack enabled, attempting to stage a MARC record for import fails with a pop-up message that reads: "Failed to submit form: error". In intranet-error.log the following information appears: stage-marc-import.pl: /usr/share/koha/intranet/cgi-bin/tools/stage-marc-import.pl: cannot open input file /tmp/koha_hax_upload/3f11cee01b610984d5dbd6430106d173_koha.mrc: No such file or directory The permissions of the directory and file above are as follows: drwxr-xr-x 2 hax-koha hax-koha 4096 Mar 5 16:18 /tmp/koha_hax_upload -rw-r--r-- 1 hax-koha hax-koha 1058 Mar 5 16:18 /tmp/koha_hax_upload/3f11cee01b610984d5dbd6430106d173_koha.mrc To reproduce, simply enable Plack in a vanilla 17.11.03 installation, then go to Home -> Tools -> Stage MARC records for import, browse for a file, hit the "Upload file" button, and then click the "Stage for import" button.
*** This bug has been marked as a duplicate of bug 15032 ***