Recently I was having a problem with exporting a form to .lss.
I would click on the .lss option and no explanation text on the right would appear and the export option wouldn't do nothing. So I tracked the Google Crome console and got this error:
Uncaught TypeError: Cannot read property 'detailpage' of undefined
at PreviewModalScript.selectItem (previewModalWidget.dist.js:62)
at PreviewModalScript.selectItemClick (previewModalWidget.dist.js:77)
at HTMLAnchorElement.<anonymous> (previewModalWidget.dist.js:140)
at HTMLAnchorElement.dispatch (jquery-3.1.1.min.js:3)
at HTMLAnchorElement.q.handle (jquery-3.1.1.min.js:3)
selectItem @ previewModalWidget.dist.js:62
selectItemClick @ previewModalWidget.dist.js:77
(anonymous) @ previewModalWidget.dist.js:140
dispatch @ jquery-3.1.1.min.js:3
q.handle @ jquery-3.1.1.min.js:3
Eventually I changed my user language to English and it worked fine and then I tried the Brazilian Portuguese and work fine too, so the problem is only with the Portugal Portuguese translation.
Maybe I would be good to verify the problem in future versions.