Please use the following instructions for the initial setup of SignRequest, which only needs to be done once.
Go to SignRequest.com in Chrome.
Open your Google Drive and right-click on a PDF.
Select Open with >.
Select + Connect more apps.
If necessary, search for “SignRequest”.
Click + Connect.
Uncheck Make SignRequest the default app for files it can open.
Click OK.
Close the pop-up window.