I installed and activated the plugin tweet this.
I followed the instruction to get consumer key, consumer secret, access token, access token secret. I filled the form in the settings.
But when I tested the authentication, I didn't get any positive message.
I saved nonetheless.
I checked the "tweet this" on a post and when I update I got this message : Fatal error: Class 'OAuthSignatureMethod_HMAC_SHA1' not found in /home/www/1373033d20eb0c23262457c32460c38a/web/wordpressen/wp-content/plugins/tweet-this/lib/twitteroauth.php on line 62
I really don't know what went wrong.
I changed all rights to read, write, execute for all users for all the files in tweet-this directory but it still doesn't work.