The captions file (xx-XX.labels.txt) is generated but is empty (0 kB). Works well when edited manually but no success to get it generated from Joomla. Permissions set too 755 (or even 775) with no success. Any hint?

Sorry - I found the solution in this forum (was not successful for the first time):

In the file /administrator/components/com_sigpro/js/script.js at the line 55, replace

submitform(pressbutton);

by

if ( typeof submitform === 'undefined') {
$sig('#adminForm').find('input[name=task]').val(pressbutton);
$sig('#adminForm').submit();
}else{
submitform(pressbutton);
}

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