Last 2-3 days i try to play Forza Horizon 4 and i can't. how can fix it?

Last 2-3 days i try to play Forza Horizon 4 and i can’t. The start screen appeared for a few seconds and then closes without error! how can fix it?

Hello,

In order to effectively track and process support issues, we will be locking and directing all Support posts to the Support Site.

For Community Support, please visit https://support.forzamotorsport.net
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Thank you!