Please help us help you and fill where relevant:
LimeSurvey version: 6.15.4 CE
Own server or LimeSurvey Cloud: OwnServer
Survey theme/template: N/A
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I am trying to use the GoogleOAuthSMTP plugin but running into issues. I am currently running the survey through a cloudflare tunnel and is accessed using HTTPS. When trying to use the plugin I receive the following error "the OAuth authentication requires the application to be served over HTTPS."

What is the best way to fix this error? Because I run this on a Docker container, creating an SSL certificate would be a PITA... I guess I could setup mailgun instead, but if I can use the plugin this would be the easiest.

Thanks.