We’re getting this error when trying to log in to an upgraded site. The site works fine on the main URL, but trying to log in at /umbraco/ returns this weird OpenID error about https (the certificate is valid):
The site worked fine while being upgraded etc. - only now, when in Production mode it’s acting up.
Someone had a similar problem (but not the same error) where the use of the UmbracoApplicationUrl appsetting helped, but that’s been of no use here, so far.
Does anyone know what this problem is exactly?
EDIT: I can see this is kind of a duplicate of this one now, which I didn’t find initially:
I had a similar setup and got it working here’s what my appsettings.json looks like for reference, maybe it helps you spot what’s different on your end:
UmbracoApplicationUrl set under WebRouting AND UmbracoBaseUrl under Global both pointing to the correct HTTPS URL
UseHttps: true explicitly set
BackOfficeHost set under Security if your backoffice runs on a separate subdomain