Error 503

#1
2017-09-03 21:17:42.452 [INFO] [151.42.217.120:56419:HTTP2-3] File not found [/home/ecomesif/public_html/503.shtml]
2017-09-03 21:17:42.449 [INFO] [151.42.217.120:56419:HTTP2-1] File not found [/home/ecomesif/public_html/503.shtml]
2017-09-03 20:46:10.289 [INFO] [93.41.97.219:52235-Q:7419375488778642962-259] File not found [/home/ecomesif/public_html/503.shtml]
2017-09-03 20:46:10.203 [INFO] [93.41.97.219:52235-Q:7419375488778642962-261] File not found [/home/ecomesif/public_html/503.shtml]
2017-09-03 20:25:14.602 [INFO] [93.41.97.219:52235-Q:7419375488778642962-9] File not found [/home/ecomesif/public_html/503.shtml]
2017-09-03 20:00:46.649 [INFO] [93.38.64.144:5106:HTTP2-15] File not found [/home/ecomesif/public_html/503.shtml]


since I installed the litespeed cache plugin, these errors appear on my server ... How do I fix it?
 
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