Unable to generate xml signature

Using the sp.pfx file that comes with the demo application I am recieving the error:
Unable to generate xml signature

Inner exception:

Could not create hash algorithm object. If the application has been trimmed, ensure the required algorithm implementations are preserved.

SignatureAlgorithm in the PartnerIdentityProvider configuration is set to:

“SignatureAlgorithm”:https://www.w3.org/2001/04/xmldsig-more#rsa-sha256

LocalServiceProvider Cert configurations is:
“LocalCertificates”:[
{
“Use”:null,
“String”:null,
“FileName”:“Certificates/sp.pfx”,
“Password”:“password”,
“StoreName”:null,
“StoreLocation”:null,
“SerialNumber”:null,
“Thumbprint”:null,
“SubjectName”:null,
“Key”:null
}
]

Is there a different property that needs to be set to get this to work correctly?