//MediaWiki// 1.28, //Visual Editor// 0.1.0 (93528b7).
The script `load.php?debug=false&lang=ru&modules=startup&only=scripts&skin=vector&*` which is invoked from //Special:Upload// begins with:
```
/*
[da4dbb21224ac8367486c80b] /w/load.php?debug=false&lang=ru&modules=startup&only=scripts&skin=vector&* BadMethodCallException from line 845 of /var/www/wiki/w/includes/session/SessionManager.php: Sessions are disabled for this entry point
*/
if (window.console && console.error) {console.error("[da4dbb21224ac8367486c80b] /w/load.php?debug=false\u0026lang=ru\u0026modules=startup\u0026only=scripts\u0026skin=vector\u0026* BadMethodCallException from line 845 of (path to MediaWiki)/includes/session/SessionManager.php: Sessions are disabled for this entry point");}
```
It writes the message to the console log.
Switching //Visual Editor// off stops this.
Switching