Replying to posts issue,
 

I get this error when replying to posts regardless of length.

Please advise.

Edit :

Seems it's only when I use the quote option.

Please provide a link to a specific post that generates the error so that we can review an example specific to your issue. Additionally, please state if this occurs to just one or multiple threads.

We'll also need the following information:
1) Accessing via desktop, laptop or mobile device?
2) What OS is used?
3) What browser is used?
4) What 3rd party plugins are being used?

No time for that, I just won't quote lol.

I have not seen the issue myself and have not seen reports from others regarding the issue. Therefore, we'd need some basic information to go off of. There are many different combinations to using the site that likely have a factor in the issue. My suggestion without getting the basic information I requested, is to disable any 3rd party plugins you're using within the browser as that's likely a culprit to interfering with the script. If that's not it, we'd need the requested information to review.