Bild Slide Beschriftung Hintergrundfarbe

Hi Jordan,
are you still there to help? We had that topic, that we solved. I can’t replay there because it was solves.
But now it is the same as before:-(. I did a mistake and delated the slider. So I had to rebuild it, took the same code that worked, but know the caption title background stays grey-black, instead of white.
I wanted to have a black font a a white background.
I cleared the browser cash. But that doesn’t help. Do you know why?

We used that css-codes, but it is not working anymore:

.slideshow_align_caption h2{
color:#000!important;
}
.avia-caption-title. (Purchase code hidden if logged out) . (Purchase code hidden if logged out) . (Purchase code hidden if logged out) . (Purchase code hidden if logged out) . (Purchase code hidden if logged out) . (Purchase code hidden if logged out) {
background: rgba(255, 255, 255, 0.5)!important;
}