When I add a file attachment form field in my process start form:
<div class="form-group"> <label for="quote">Quote:</label> <input class="form-control" type="file" id="quote" cam-variable-name="quote" cam-variable-type="File" /> </div>
…and the user does not attach a file, I get the error: The process could not be started. : Unsuccessful HTTP response
I would like the file to be optional. How can I avoid this error message?