Please use the following instructions for the initial setup of SignRequest, which only needs to be done once.
Setup and activate SignRequest
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.
Close the pop-up window.