A new error message which comes up some times:

Error: 
chrome://conkeror/content/utils.js:338
abort()@chrome://conkeror/content/utils.js:338
()@chrome://conkeror/content/minibuffer-read.js:205
()@chrome://conkeror/content/minibuffer.js:266
exit_minibuffer([object Proxy])@chrome://conkeror/content/minibuffer-read.js:456
([object Object])@chrome://conkeror/content/minibuffer-read.js:465
call_interactively([object Object],"exit-minibuffer")@chrome://conkeror/content/interactive.js:143
_do_call([object Generator])@chrome://conkeror/content/coroutine.js:279
co_call([object Generator])@chrome://conkeror/content/coroutine.js:427
input_handle_keypress([object KeyboardEvent])@chrome://conkeror/content/input.js:304