Gives an error page when clicked on upload link on the attach screenshot page

Steps to reproduce:
1. Click on the three dots in the right column of the Jira agile page.
2. Click on 'Attach Screen shot'
3. Click on the 'Upload'
4. The following error page is displayed.

Technical details
Log's referral number: 0552a9f0-14dc-4962-9931-0af52ad06fea
Cause
Referer URL: http://build:9090/secure/RapidBoard.jspa?rapidView=14&view=detail&selectedIssue=FLD-248
java.lang.NumberFormatException: For input string: ""
java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at java.lang.Long.parseLong(Unknown Source)
at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction$1.get(ShowAttachScreenshotFormAction.java:295)
at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction$1.get(ShowAttachScreenshotFormAction.java:292)
at com.atlassian.jira.util.collect.TransformingIterator.next(TransformingIterator.java:38)
at com.atlassian.jira.util.collect.CollectionUtil.foreach(CollectionUtil.java:44)
at com.atlassian.jira.util.collect.CollectionUtil.toList(CollectionUtil.java:73)
at com.atlassian.jira.util.collect.CollectionUtil.transform(CollectionUtil.java:142)
at com.atlassian.jira.util.collect.CollectionUtil.transform(CollectionUtil.java:165)
at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction.getTemporaryFileIdsToConvert(ShowAttachScreenshotFormAction.java:291)
at com.atlassian.plugins.jira.screenshot.webwork.ShowAttachScreenshotFormAction.doExecute(ShowAttachScreenshotFormAction.java:307)
at webwork.action.ActionSupport.execute(ActionSupport.java:165)