Yes Chrystl, I have replaced the frontend-nav-menu.php file by that of the version 1.7.9.
But beware, I’m no expert, it’s a solution that works, but I do not know the potential impact on the database. It is safer to make a backup beforehand.
Hello,
I have the same problem with the theme generated with Artisteer. The only solution I have found is:
Download version 1.7.9 Polylang and copy the file “frontend-nav-menu.php” by ftp located in “wp-content / plugins / Polylang / frontend”
This is probably not very clean, but it works temporarily.