Only mode "driving" works. transit / walking / bicycling have replacement error.

[vince-p]

Editing this to describe the error better:

When i set the mode to "driving" the gmapsdistance function works fine, but setting any other mode results in an error.

Here is the code I am running:
gmapsdistance( key=<MYKEY>, origin= "St+Peters,+NSW", destination = "Glebe,+NSW", mode="driving", shape = "wide", avoid = "", departure = 1557086400, traffic_model = "pessimistic" )

That works perfectly fine.
But when I change the mode to "transit" or "walking" or "bicycling" then I get the following error:

Error in data$Time[i] <- as(rowXML[[duration_key]][1L]$value[1L]$text, : replacement has length zero

[jlacko]

this issue has been resolved in issue 4.0.0 on CRAN since 2022-04-26

the root cause was that the traffic model is a recognized parameter of Google API call only for mode driving / see https://developers.google.com/maps/documentation/distance-matrix/distance-matrix?hl=en#traffic_model