Timed out waiting for packet header ESP32 wrover and adapter

[3NiGMa]

Hey all,
I am using an esp32 wrover b, and am trying to flash it via the USB port on a raspberry pi 3. My circuit diagram is set up as follows https://www.google.com.au/url?sa=i&rct ... 6035894274 . Upon running

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esptool.py —chip esp32 —port /dev/ttyUSB0 erase_flash

I am given the output

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Connecting......._______…………______……………____

followed by

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A fatal error occurred: failed to connect to esp32: timed out waiting for packet header

Does anyone know how to fix this error and flash the esp32?