and I searched in every file for Provider.forUseAtConfigurationTime but couldn't find

Please do not split topics across several threads. This makes following the conversation in the threads view very hard as the context of the other messages is missing. If you have additional information either edit the original message or post to its thread. Regarding the problem, you said you get errors, but you did not show any errors. As you seem to talk about the warnings, they are warnings not errors. And they even tell you how to get exactly where it is used, so why don't you do what it tells you?

The codelab sample uses quite outdated versions of build tools (Gradle 7.0, AGP 7.0, etc). Apparently, you're trying to run it with a newer version of Gradle (8.9). You should either stick with the old version (i.e. use the gradle wrapper from the sample), or at least update the plugins, because the deprecations actually come from plugins, as you can see from the code locations provided.