[Neve] Navigation top menu dropdown became transparent, and I can’t fix it

I am using Neve theme and I created a navigation main menu on top of my site. But when I add dropdown pages, the dropdown became transparent. I already searched for the solution. Found one, that says it’s Neve themes problem (https://www.ads-software.com/support/topic/dropdown-menu-transparent-after-update/ ). So I tried rolling back to previous version of Neve as they told in this solution but didn’t work.
Any solution, folks?

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