In the case of a Sandbox being created from a production instance, where the airSlate app has already been installed, you may encounter the following issues:
unable to connect an airSlate admin account
unable to connect a Workspace, even after connecting an admin account
Follow the steps below to correct your airSlate app’s compatibility with Salesforce Sandbox:
1. Go to Setup and search for Custom Settings.
2. Select airSlate settings → Manage → Edit.
3. Then, delete values for InstallationUser_ID, WorkSpace_ID, and WorkSpace Subdomain. Once done, click Save.