Problem with custom css

Replies: 0

I can not save my custom css any more. The following message appears:
Your braces {} are not equal. Make sure that there is {closing} for each opening.
And the following message:
Errors with unequal / unsigned characters can be caused by content: “”; declarations. You may need to remove or add this to an individual CSS file.

I have tested the css declaration in Dreamweaver and another program and found no error.

What else can I do?

greetings
Klaus