When I start the game on my iPhone 11 Pro Max, then the loading screen (while it is waiting for return data) throws an error.

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I tried to run the game via mobile data (mobile internet), but the same happens.

I tried to uninstall the game, then reinstall it, but the same happens. (I turned my phone off and onin between.)

I tried to run the game from my computer via Plarium Play, but the same happens.

In the meantime I can not complete the summon rush event, where only 200 points were missing from the last legendary book.

And I can not progress in the fusion event for Vlad (15 fragments are missing).

Please help me, because I am frustrated.