504 Gateway timeout

Hello,
I have been using the free version of elementor for the last 3 months. It was working fine but in the last few days, websites go down whenever I edit the page. When I see the server logs it says the ram is full. Any help is appreciated. My website is deployed on AWS ec2 instance and server specs are as follows
instance type: t2.micro
1gm ram
30GB SSD

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