Error Description One or more certificates might be in an invalid state. We will try to access the certificate key for each certificate and as a result you might be prompted one or more times to enter your password to access the user keychain. When that happens, select 'Always Allow' to grant 'dotnet' access to the certificate key in the future. Something went wrong. The HTTPS developer certificate could not be created. Run command in terminal dotnet tool uninstall --global dotnet-dev-certs (If not install error. Don't care. ) dotnet tool install --global dotnet-dev-certs dotnet dev-certs https --trust Restart Visual Studio OR MAC If it's not work. Go to Keychain Search "visual studio" Delete all key Run commands again
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