# Possible Bug in Web Application **URL:** \ **Category:** Uncategorized\ **Tags:** ner, done, front-end, review\ **Created:** [July 1, 2020, 4:50pm UTC](https://support.prodi.gy/t/possible-bug-in-web-application/3124 "2020-07-01T16:50:15Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![ines](https://sea2.discourse-cdn.com/flex020/user_avatar/support.prodi.gy/ines/32/3_2.png) [@ines](https://support.prodi.gy/u/ines)\ **Post date:** [July 1, 2020, 5:00pm UTC](https://support.prodi.gy/t/possible-bug-in-web-application/3124/2 "2020-07-01T17:00:44Z")
Thaks for the report and sorry about that! It's pretty mysterious, but it looks _very_ similar to the one reported here: > [@Random crash of NER UI while annotating](https://support.prodi.gy/t/random-crash-of-ner-ui-while-annotating/3094): > > I've had prodigy for less than a day, I'm very happy with what this tool has to offer, so thank you for creating it. Now to my issue: I was using the ner.correct recipe on a dataset of about 1100 lines. Suddenly my prodigy web app crashed, with the following error. TypeError: Cannot read property 'start' of undefined in t in Jss(t) in div in t in Jss(t) in Unknown in t in Jss(t) in div in div in t in Jss(t) in Connect(Jss(t)) in main in div in Shortcuts in t in n in Jss(n) in Connect(Jss(n)) … Can you reproduce the problem with the same example, or is it non-deterministic? There's realy only one place in the code that changed and that could cause this, and I'm pretty sure I already fixed it and it'll go out with the v1.10.1 release (likely this week) 🙂 --- _[View the full topic](https://support.prodi.gy/t/possible-bug-in-web-application/3124)._