Hello,
Thanks for reporting your issue on the forum.
I’m not able to reproduce it when using the latest versions of Nimble Builder and WordPress.
If the problem persists after following the usual troubleshooting steps, could you share the url of the page and describe the steps to reproduce it ?
https://nf-teh.ru/studentu/uchebno-vospitatelnaya-rabota/
Now the VK logo is at the beginning of the block, but it is not visible, you can click on it to go to the page. There are no problems with other logos.
It’s because the icon is white on a white background
Set a custom color. The problem is the same
OK. Inspecting the page code, it seems that some third party CSS rules override the ones of Nimble Builder. That’s why you can’t change the color style of some social network icons.
Those third party rules are not the one of the Hueman theme ( that you use ), so they are either added by a third party plugin or by some custom CSS that you’ve added to your theme.
I recommend to isolate the source of those rules by following the troubleshooting steps provided earlier.
I hope it can help.