If you need to upload a new style sheet, this can be done from within the platform.
Navigate to Whitelabel > Styles > Add New Style
Your style sheet needs to be saved in .json format, otherwise, you will be met an "invalid" error message.
If you are not able to access the Whitelabel section of the Punchh Platform, please contact your customer success representative or submit a support ticket to https://support.punchh.com