More number of data will not be a cause for this error . Connection error usually occurs when the applocation server is not running. Just confirm that your application is running or not.
Hi shaun,
I have a very similar error where my user gets a "Connection error" like in your screenshot and in the browser console also the "ERR_INSUFFICIENT_RESOURCES"" pops up together with a bunch of mxui.js errors. How did you fix your problem? I cant think of any reason this pops up so frequently in my app