Azure Function error Unable to load DLL

Question

Problem

I am trying to create a azure function to create html to pdf. It runs locally perfectly fine but when I deployed it to azure function It shoes me the error

Error

Unable to load DLL 'libwkhtmltox' or one of its dependencies: The specified module could not be found.

Code

public static HttpResponseMessage Run([HttpTrigger(AuthorizationLevel.Function,"post", Route = null)]HttpRequest req, TraceWriter log)
    {
        log.Info("C# HTTP trigger HtmlToPdf processed a request.");

        //string name = req.Query["name"];

        string requestBody = new StreamReader(req.Body).ReadToEnd();
        dynamic data = JsonConvert.DeserializeObject<Body>(requestBody);

        var pdf = Pdf
            .From(data.Html)
            .Content();

        log.Info($"PDF Generated. Length={pdf.Length}");

        var res = new HttpResponseMessage(HttpStatusCode.OK);
        res.Content = new ByteArrayContent(pdf);
        res.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
        res.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("inline");
        return res;
    }

Hmmm....perhaps it could not load DLL 'libwkhtmltox' or one of its dependencies? Did you upload it(them)? Classic case of _it works on my machine_? — , Jul 20 '18 at 06:22
Please provide some more details. This is very little to go on with — ThePretendProgrammer, Jul 20 '18 at 06:47
Which pdf convert package do you use? And what's your function version, v1 or v2? — Jerry Liu, Jul 27 '18 at 09:28
How do you define `Body` in `JsonConvert.DeserializeObject(requestBody)`? I use `JsonConvert.DeserializeObject(requestBody)` and `(string)data.Html` to convert json request body. It works both locally and on Azure for me. It looks like openhtmltopdf has no dependency on libwkhtmltox. — Jerry Liu, Jul 30 '18 at 07:48

Azure Function error Unable to load DLL

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