Just open one blank tab

[pabloab]

Trying to restore the tabs, after Open x tabs of all y tab(s) just open one blank tab, try to run xdg-open (a unassociated file type?). Clic yes, nothing happens. This on console.log:

Uncaught TypeError: Cannot read property 'focus' of null
    at openTabsWin (converter.js:174)
    at Array.map (<anonymous>)
    at HTMLAnchorElement.ela.onclick (converter.js:258)
openTabsWin @ converter.js:174
ela.onclick @ converter.js:258

Ubuntu 16.04.3 LTS, google-chrome-stable 64.0.3282.119-1