I think you need to use the tag slug, not the tag name now. This has change a while ago because in multi-lingual forums tags can be translated, so there is no longer only one name.
I copied one of your examples (I don’t speak Chinese).
When you are the the topic list filtered for that tag, you can open the tag edit page
There you can see the name and the slug
So you configure the tag icon component with 74-tag,book-open-reader,#A8C6FE and then I see
