Installing a safety relay with wifi

Hi, I’m also new to this product https://a.aliexpress.com/_mNrg8bO the problem is that I connected it the first time and everything went well, but when I mounted it to the safety panel… it gave me an error with the current leakage and by mistake I deleted the application … and now I’m struggling to connect to the internet and it tells me that it can’t find the internet. Please help me Thank you !