error 299 y 421

[Alejandro Atala]

Hello, I was testing the tool and it worked perfectly, only that I automated it with crontab and after a couple of captures it started to throw me the error 299 and 421. How often can you make the captures so as not to have problems? Thank you

wkhtmltoimage --height 1500 --crop-h 500 --crop-w 800 --crop-x 0 --crop-y 1050 https://aprs.fi/info/a/LW7EEA-1 /home/lw7eea/carga/imagen_aprs.png
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Error: Failed to load https://aprs.fi/info/a/LW7EEA-1, with network status code 299 and http status code 421 - Error transferring https://aprs.fi/info/a/LW7EEA-1 - server replied:
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