ESP32S v1.1 NodeMcu board, can't connect to WiFi if usb is connected

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1. Hi, I have a simple code in MicrpPython to connect to Wi-Fi, just to reproduce the error.
2. import network, requests, json
3. from machine import Pin
4. import time
5.  
6. ssid="branca"
7. pwd="zzzzzzzzz"
8. led=Pin(2,Pin.OUT)
9.  
10. led.off()
11.  
12. # Crea objeto de red wifi
13. wlan=network.WLAN(network.STA_IF)
14.  
15. # # Conecta a la red wifi
16. if not wlan.isconnected():
17.     print ('Connecting to ' + ssid, end=' -> ')
18.     wlan.active(True)
19.     time.sleep(1)
20.     wlan.connect(ssid, pwd)
21.     timeout=0
22.     while not wlan.isconnected() and timeout <10:
23.         print(str(timeout), end=',')
24.         time.sleep(1)
25.         timeout+=1
26. ip=wlan.ifconfig()[0]
27. print("Conectado. IP: ", ip)
28. led.on()
29.  
30. If I have the usb cable connected to an IDE, the board resets with this error:
31.  
32. Connecting to branca -> ets Jul 29 2019 12:21:46    
33.  
34. rst:0x8 (TG1WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
35. configsip: 0, SPIWP:0xee
36. clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
37. mode:DIO, clock div:2
38. load:0x3fff0030,len:4728
39. load:0x40078000,len:14888
40. load:0x40080400,len:3368
41. entry 0x400805cc
42. W (54) boot.esp32: PRO CPU has been reset by WDT.    
43. W (54) boot.esp32: WDT reset info: PRO CPU PC=0x40081b4b
44. W (56) boot.esp32: WDT reset info: APP CPU PC=0x40081b4b
45.  
46. If I close the IDE, the program runs normally.
47. Is there a hardware malfunction .?. The board functioned well  2 days ago !!!!!
48.  

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