Hi Chouby,
Whenever I install a plugin I got the following error:
Warning: call_user_func_array() expects parameter 1 to be a valid callback, class 'Polylang' does not have a method 'post_upgrade' in /home/xxxx/public_html/wp-includes/plugin.php on line 173
2 Questions:
1. I read you fixed this issue in the next upgrade, how long till release?
2. After updating Polylang do I have to re-install all plugins?