Elegoo smart car 4.0 wifi problems

Hi! I bought an Elegoo smart car 4.0 kit few days ago. At the beginning the car worked also using the smartphone. After pressing reset many times, it didn't work anymore. Can someone help me please?

Your post was MOVED to its current location as it is more suitable.

Try and remove all power for, say one minute, and then power up again.
More useless guesses? If not post the code, and schematics, all according to the advising first topic "How to get the best out of this forum. Link: How to get the best out of this forum - Using Arduino / Introductory Tutorials - Arduino Forum