Three days ago, I was able to access my website deployed onto Google App Engine with no issues. Since that time I haven't changed anything in the files for my project, but when I deployed recently I was given a site can't provide a secure connection error, and the website was sent an invalid response.
I'm not sure whether this is an issue on App Engine or my code, as this only occurs with the most recently deployed instance of the website on App Engine. For example, I have deployed once, been given this error, then deployed again a couple minutes later, and that initial instance that is now second in line (with 0% traffic) works fine, while the new most recent (active) instance with 100% traffic, has the same error.
I am working with a Flask framework with the correct file structure, including static & templates folders, app.yaml and main.py files. I'm happy to post specific code snippets as requested in comments, I just don't know what code would be helpful to diagnose since there haven't been any changes since it was working fine a couple days ago with the same code.
Any ideas and advice is greatly appreciated.
UPDATE: Removing the 's' from https takes me to the following page... clicking 'proceed anyway' takes me to the website just fine though
