400 Bad Request Your request resulted in an error. Bad SAML request

[shree0210]

When trying SSO with custom SP applicaton I get the below error.

ERROR:
400
Bad Request
Your request resulted in an error. Bad SAML request
Error: Bad SAML request

Why does this error occur and how to solve this? I have attached the SAML Request and also the SSO URL below.

SAML Request:

<?xml version="1.0" encoding="UTF-8" standalone="no"?>

<saml2p:AuthnRequest
xmlns:saml2p=“urn:oasis:names:tc:SAML:2.0:protocol”
AssertionConsumerServiceURL=“http://localhost:8080/TestApp/ACS”
Destination=“https://dev-92809401.okta.com/app/dev-92809401_samlserviceprovidertest_1/exk7u1c2atoMGqnqE5d7/sso/saml”
ForceAuthn=“false”
ID=“a6c967da-2253-418b-bf25-53c90f50af7d”
IsPassive=“false”
IssueInstant=“2024-08-29T17:47:01.529996”
ProtocolBinding=“urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST”
ProviderName=“TestApp”
Version=“2.0”>
<saml2:Issuer
xmlns:saml2=“urn:oasis:names:tc:SAML:2.0:assertion”>http://localhost:8080/saml-service-provider-test
</saml2:Issuer>
</saml2p:AuthnRequest>

SSO URL:
https://dev-92809401.okta.com/app/dev-92809401_samlserviceprovidertest_1/exk7u1c2atoMGqnqE5d7/sso/saml?SAMLRequest=fVJdb5swFP0r1n13MG4IYIVUrF23Su0WNXSvlWOcBRVswjWoP3%2BGEC2Tpj5a956Pe47Xtx9NTQbdYWVNBuGCAdFG2bIyvzN4LR5oAgSdNKWsrdEZGAu3mzXKpuatyHt3NC%2F61Gt0xBMZFOdJBn1nhJVYoTCy0SicErv8%2BUnwBRNtZ51VtgaSI%2BrOeek7a7BvdLfT3VAp%2FfrylMHRuVYEQW2VrI8WnUhYwoLCa%2BVtG%2BR3OyD3%2FlEZ6Sbz4z56QKkHmvKEpUsWLuy7kwtlm0B6zPXkbXSKZzlvaKhK78TTvYWB%2FniP%2B1Bx6ezzt5M5fY3KOEC0wQgB8mA7pafTMzhIzwHk8T4DuVLpKi4l5Ty6ocsw2dP9gUc0ulEpO0RMHuLSb%2BJWIlaD%2FotF7PWjGUN2GXDGl5QllKdFGItlLPwNEU%2FTdAVkO%2Bf2pTLnfj4LeX9eQvG9KLZ0%2B3NXTATTnT%2F8dgZzkkB%2BXer3OJjLFZOt7rrVz%2FXkpUrY%2FL%2B4kYPOgdNL4nSMfB1cS27m57%2Ffa%2FMH&RelayState=http%3A%2F%2Flocalhost%3A8080%2FTestApp%2FACS

In the above request the SAML XML is deflated, Base64 encoded, and url encoded.

Thanks in advance.