Change background for one event sub-page

Hello I am looking to change the color and background for one event subpage. I would like to replace the background with an image, and have it only apply to one event in particular.

I have been trying this but it is not functioning currently. If it does it seems it will apply to the events page in general either way.

section[data-section-id="64e28a2f47825a188085e871"] .section-background {
    background-image: url(/s/Friction-Presents-Background.png) !important;
    background-size: cover!important;
    background-repeat: no-repeat!important;
    background-color: transparent!important;
}

@OtisH Would it be possible to share the URL of the event subpage where you're trying to change the background image? Thanks!

Yes

https://www.frictionquartet.com/events/friction-presents-lyric-suite

thanks!

@OtisH Your code appears to be correct except the background-image url part. Did you upload the background image on Squarespace? 

@Lesum Yes I have uploaded the background image on Squarespace. I realized I had the code commented out since it wasn't working. I have re-enacted the code. Unfortunately there are two problems.

The background change shows up on the preview screen when editing the website but is not reflected when actually visiting the site. Additionally on the edit preview screen this changes the background for the events page as well since it seems they share a section ID. Is there a way to change ONLY the specific event subpage?

Thanks!

@OtisH You need to change your code from this

section[data-section-id="64e28a2f47825a188085e871"] {
    background-image: url(https://frictionquartet.com/s/Friction-Presents-Background.png);
    background-size: cover;
    background-repeat: no-repeat;
    background-color: transparent !important
}

to this

section[data-section-id="64e28a2f47825a188085e871"] {
    background-image: url(https://frictionquartet.com/s/Friction-Presents-Background.png);
    background-size: cover;
    background-repeat: no-repeat;
}
section[data-section-id="64e28a2f47825a188085e871"] .section-border, section[data-section-id="64e28a2f47825a188085e871"] .section-background {
    background-color: transparent !important;
}