What causes: Error "Cannot read property 'code' of undefined” when tweeting with attached video

video
error-codes
error-handling

#1

I posted this tweet in 2017 but still get replies to it a few times a month from users with same issue. What does the error mean, what causes it?

Tweet: https://twitter.com/MattNavarra/status/839180129469358080

Twitter is having issues:
Users can’t post tweets with images or video - Error "Cannot read property 'code' of undefined” #twitterdown

— 𝗠𝗮𝘁𝘁 𝗡𝗮𝘃𝗮𝗿𝗿𝗮 (@MattNavarra) March 7, 2017

#3

Hey Matt, sorry you continue to have folks reply to your Tweet about this! Suspect they are searching for the same error message they are seeing and then +1’ing your Tweet.

I think this is / was a temporary issue related to Javascript not loading in the Twitter.com web page, for some reason - could be a network issue. Unfortunately not something we are able to answer on the developer (API) forums, as this doesn’t relate to video uploaded via the developer platform. I’d refer folks to @TwitterSupport in the meantime.