Statistics Not Showing

Hi, hope someone can help. My emails are sending fine however when I click on statistics for the sent email they are not showing anymore at all. There are tabs but they are all empty.

If I click on a subscriber statistics, I get the following error:

Error: Minified React error #31; visit https://reactjs.org/docs/error-decoder.html?invariant=31&args%5B%5D=object%20with%20keys%20%7B0%2C%20id%7D for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
File name: No fileName reported
Stack trace: Error: Minified React error #31; visit https://reactjs.org/docs/error-decoder.html?invariant=31&args%5B%5D=object%20with%20keys%20%7B0%2C%20id%7D for the full message or use the non-minified dev environment for full errors and additional helpful warnings.
at Yi (https://www.mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2229113)
at d (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2230877)
at b (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2232018)
at e (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2234075)
at Ms (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2245727)
at zc (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2293105)
at hl (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2281715)
at fl (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2281643)
at Al (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2281506)
at il (https://www. mysite.co.uk/wp-content/plugins/mailpoet/assets/dist/js/commons.js:16:2278647)