This guide covers a few troubleshooting questions.
The default workflow runs once every 24 hours. To sync your project manually, you can trigger the workflow on GitHub by hand.
If there is a configuration issue, take a look at the workflow log. The crowdin action highlights issues like a wrong PAT, path to the source files, etc.
If you need additional help to set up your project, you are welcome to ask on the community forums or on gitter.