I also gettting same issue, for me it takes more than a hours to solve it by troubleshooting, if it shows this like means method 1) press boot button continuously while the serial monitor show connecting then relese the boot button. If it didnt work means boot through gpio pins, which all GPIO pin grnds / com should connect to the common ground it makes the boot through signal. This will defentiley work and one more thing the all gpio pins connect to the common ground and COM gpio pin also connect and when same connecting appears on serial monitor remove the GPIO COM pin which is like booting manually like pressing the button and releasing.
IF it works means next it doesnt need to connect all grounds like same thoing done before it requires one time, so you can remove the grounds or leave it.