Can't save a changes in Templates: Styles (Site)

HI 
After I will made some changes (I will choose a logo jpg or I put a slogan txt) in the Hot Luxury - Default  site style I push the button SAVE and no changes are saved 

Hello,

If it’s Joomla 4, make sure the plugin Sparky On Save is installed and published (check this in the Plugins Manager page)

Thanks,
Milos

Yes, It's J4, Plugin is installed and Enagled.
I used a hotstart file

Hello,

If you select a logo image, then this image will be used as website logo. The logo text and slogan will be disregarded. On the other hand, if you select None for the logo image, the textual logo and slogan will be used.

Regards,
Milos

Yes, It's clear but it doesn't work.
1. choose only logo - changes not saved
2. type new slogan - changes not saved
3. color change - also not changes not saved

When I click the button SAVE it should save changes and stay on the edit view but it redirects me to the template style view so the behavior like Save&Close button

Hello,

Please provide superuser access to your site.

You can post hide this on the forum privately if you select a part of the text and click the "lock" (confidential) icon.

Thanks,
Milos