I had the same issue. Went to Permalinks settings, changed to default and saved….nothing. Then went back to permalinks and changed to the setting I originally had (sitename/page) and saved and everything went back to normal. 🙂 Thanks.
I’m getting this message when I try to access my site:
Fatal error: Call to undefined function wp_json_encode() in D:\Hosting\3647649\html\wp-includes\class.wp-scripts.php on line 186
I tried automatically uploading the new 4.1.
