New custom style vanishes

Hi.
My template for studiorosapristina.it is very old, renewed several times.
In the past, I defined eight custom styles, that work fine.
But now I’m trying to create a ninth style, that drives me mad.
It is very simple, because it just applies a yellow background. Not more. In such a way, to change the highlightened text is simpler than operating manually when the colors of the template change.
So now I create a new style, just composed by the background color (#ffff00). I save it and the preview shows the yellow background correctly.
I can apply the new class, and the code reports so. But nothing happens.
If I reopen Template Creator CK I realize that the color value vanished: the box is empty.
I tried several times, but the color value always vanishes after saving and applying the template.
What’s wrong? What can I do?

Hi
thanks for reporting that
Please tell me
- which version of template creator
- which version of joomla
you are using
CEd

Template Creator CK 5.0.8
Joomla! 3.10.3

Thank you!

please try to replace this file
www.dropbox.com/s/c9xaf0cmmznqtsb/ajaxstylescss.php?dl=0
in
administrator\components\com_templateck\interfaces

tell me if it works
CEd

It work perfectly.
Thank you!

great, thank you for your feedback
it will be integrated in the next version