1. How to remove the animation in the logo in Sj Plus template? (The logo will be shown without animation)
2. How to reduce the horizontal separation between menu items

Dear sir,

Please go to the file:
/templates/sj_plus/css/template-blue.css and remove this code:
#yt_header #yt_logo {
-webkit-transform: translate(0,-200px);
-moz-transform: translate(0,-200px);
-ms-transform: translate(0,-200px);
-o-transform: translate(0,-200px);
transform: translate(0,-200px);
animation: 1s ease 2s normal forwards 1 comeDown;
-webkit-animation: 1s ease 2s normal forwards 1 comeDown;
}

2. In same css file, please find:
#yt_mainmenu #moonavigator li.level1 > .item-link {
margin: 0;
line-height: 30px;
padding: 12px 30px;
color: #fff;
font-size: 118%;
display: block;
}
Please edit:
padding: 12px 30px;
to become:
padding: 12px 20px;

and find this code:
#yt_mainmenu #moonavigator li.level1.havechild:after {
content: "\f0d7";
font-size: 12px;
font-family: "FontAwesome";
position: absolute;
top: 28%;
right: 15px;
z-index: 5;
color: #fff;
}
Edit right: 15px; to right: 5px;

Thanks

No more logo animation, fixed with your instructions. Thanks
Pending: How to reduce the horizontal separation between menu items, and how to fix the missing background when the website is displayed on screens with other dimensions. View background-missing-screenshot.
Very important:
Before I made changes instructed by you, appeared a more important problem: I can't style the template because:
An error has occurred.
0 WebAssetManager is locked, you came late.
How to fix this error on the SJ_plus template.
Note that I can style the other installed templates

Dear sir,

Please edit the code via ftp account.

Thanks

I don't understand what code you refer to. The logo animation was fixed with your instructions.
The only ending are How to reduce the horizontal separation between menu items, and how to fix the missing background when the website is displayed on screens with other dimensions. View background-missing-screenshot.
Very important:
Before I made changes instructed by you, appeared a more important problem: I can't style the template because:
An error has occurred.
0 WebAssetManager is locked, you came late.
How to fix this error on the SJ_plus template.
Note that I can style the other installed templates

Same problem! I just upgraded the template to SJplus _JXv4.01. If I disable 'YT framework' I do not have message: the An error has occurred.
0 WebAssetManager is locked, you came late-; but the template needs YT framework! Please point me to the file and the code to edit . I'd love to use the template in Joomla4 on PhP8.2