We are using ComponenSpace SAML 2.0 Single Sign-On (SSO) Component for .NET 2.4.0.1 (for SAML 2.0 Specification) to integrate with ADFS as the IdP. To make a long story short, everything is fine with Chrome (70) and FF (63). However, with IE 11 and Edge, ADFS shows an error (event ID 303) with the description "Invalid length for a Base-64 char array or string", and in our logs we show a general error status:responder. So I'd like to ask if anyone knows of what can cause ADFS errors when IE11 or Edge send the SAML request to ADFS, but when Chrome or FF send the request there is no error (the requests are the same). Thanks in advance
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