This one provided by Support and may fix your issue like our team members.
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Close all game-related apps. Shut down EA SPORTS FC 26, the EA App, and Steam (if applicable).
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Delete the game's local cache. Go to C:\Users[YOUR_PC_NAME]\AppData\Local and delete the EA SPORTS FC 26 folder. You may need to show hidden files to find the AppData folder.
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Verify game files.
On Steam: Right-click the game in your Library, go to Properties > Local Files, and click Verify integrity of game files.
On the EA App: Click on Manage for EA SPORTS FC 26 and select Repair. -
Re-launch the game. Open the EA App, then Steam (if applicable), and launch FC 26.
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Re-enable Cross-play. Go to Online Settings and turn Cross-play OFF, enter a game mode like Rivals, then switch Cross-play back ON before starting your match.