[V7] Set Quotation as Lost

For submitted quotations; When clicking on “Set as Lost” button, “Reason for losing” dialogue window appears as usual. The problem is that; when clicking on “Update” button after writing the loosing reason, nothing is happening (i.e; dialogue window keeps appearing as it is, and document status remains “Submitted” not “Lost”)!
This problem started after the last update of ERPNext.

@Proact Sorry but could not able to reproduce the issue.

is there any error on console?

Here’s the help to open javascript console: http://webmasters.stackexchange.com/questions/8525/how-to-open-the-javascript-console-in-different-browsers