I cna't figger out custom code! Please help!

As no-coder i got a problem!
i add a code, in other side it does work, but at webflow i do something wrong!
Can any coder here have a look, i think i will take a minute!
Many thanks!

Here an example of how it is and how it should be!

This is the website:


Width of rm_reservation_body is too small.

Many thanks Samliew!!!