Salesforce B2B LWR: Cybersource package v1.8.0 fails to render Flex Microform fields

mashkon — Wed, 26 Aug 2026 20:09:06 GMT

Hello,

Has anyone successfully implemented Cybersource Payments for Salesforce B2B and D2C managed package v1.8.0 in a Salesforce B2B Commerce LWR storefront?

We are using the standard packaged components with no custom development. The payment form renders, but the Cybersource-hosted Card Number and CVV fields remain blank.

We see these errors:

cybsb2b.getFlexKey
HTTP 400
{"error":[{"message":"The Apex request is invalid."}]}

cybsb2b__PTS_FlexMicroformHostD2C
HTTP 503

The 503 response contains Salesforce’s site_down/maintenance.html page. We have verified:

Package version 1.8.0
Correct TEST payment configuration and store association
Cybersource endpoints in Experience Builder Trusted Sites
Salesforce Trusted URLs and applicable CSP directives
All Classes permission set assigned to the buyer
Access to PTS_FlexMicroformController and PTS_KeyGenerationApi
PTS_FlexMicroformHostD2C Visualforce page access
Experience site is active and published
Logout/login and browser cache clearing

We have also seen a CSP refusal involving the packaged Microform host. We are investigating whether Flex Microform SDK v2.11/2.12 and its use of globalThis is incompatible with legacy Lightning Locker, but we have not confirmed that this explains the Apex 400 or Visualforce 503.

Questions:

Has anyone encountered these errors with package v1.8.0 on B2B LWR?
Does this package require Lightning Web Security rather than legacy Lightning Locker?
Are any additional Salesforce Site, Visualforce, package-license, or buyer-profile permissions required?
Is there a known patch or newer package build?
What should PTS_FlexMicroformHostD2C return when opened through the underlying Salesforce Site URL?

Any working configuration details or troubleshooting guidance would be appreciated.

topic Salesforce B2B LWR: Cybersource package v1.8.0 fails to render Flex Microform fields in cybersource APIs

Salesforce B2B LWR: Cybersource package v1.8.0 fails to render Flex Microform fields