Error in curl::curl_fetch_memory(url, handle = handle) : Send failure: Connection was reset

[endinem]

hi. I have a quick question. I have a FOR cycle in R to query certain stocks data through the package and when I run it, it goes well for a while but at a quite random place I get the following error msg: Error in curl::curl_fetch_memory(url, handle = handle) : Send failure: Connection was reset.

that's my code basically:
for (i in 1:N){

daily_data<-av_get(symbol = mysymbol_list[i,1]), av_fun = "TIME_SERIES_DAILY", outputsize = "full")
}

not sure whether it is an internet connection problem or server or what.
Any help appreciated.