page indexed but not showing on google search results

Hello,
I have created a website page for a client. It has automatically immediately been indexed on Google, and appeared in the 1st results page), although I did absolutely nothing for this. But then I installed AIO SEO on the website, I did set up the SEO information and at connected the website to Google Search Console. After this the page totally disapeared from google search results (even if I type the domain name)! It shows no errors on the google console and says the page has been indexed. Do you have any idea why this happened. What can I do to make my website appear in google search results now ?

The page I need help with: [log in to see the link]