Pingdom showing different results

Pingdom shows different results for the homepage, and when checking the pages individually, I’m getting the following results:

https://static.livechatinc.com/8801096/P8NUQPLLD2/6e0172f2e950f00b1185bb30fedc2b0c/20180517105910.j

Please advise, if there is anything that could be done to improve those, as pingdom is showing it as an error.