Error in curl::handle_setopt(handle, .list = req$options) : length(keys) == length(values) is not TRUE

[maheshrapaka]

Recently, I upgraded my R version from 3.6.0 to 4.0.0. Since then, I've been encountering the following error during simple GET or POST calls, which I never experienced with the older version. I also upgraded my httr package from version 1.4.1 to 1.4.7:

Error in curl::handle_setopt(handle, .list = req$options) : length(keys) == length(values) is not TRUE

 res <- GET("http://google.com")

curl_options() is NULL.
I am not sure this is causing the issue.

[Chipdelmal]

I had the same issue and it was solved by installing an older version of curl: install.packages('curl', version=4.3). Seems that my system is running a pretty old version of the curl Linux library.

[audrey-onfroy]

Error in curl::handle_setopt(handle, .list = req$options) : length(keys) == length(values) is not TRUE

I had the same issue, not while using httr but with pkgdown.

It was solved by updating the curl Linux library using the code provided at abraunegg/onedrive#2997.
Then, I updated the curl R package to the latest version using install.packages('curl').