The July 2026 update was released July 14, 2026. This introduced many security fixes but this can cause issues with your SAML, OIDC, or FBA implementations. This can prevent tokens from being added or read from dcache. Here are some logs from my 2019 farm:07/18/2026 12:18:03.74 w3wp.exe (0x0FF8) 0x1914 SharePoint Foundation Security Token Handler ayreb […]