Why does the embedded client display error messages when Lightning Web Security is enabled?
Salesforce does not auto enable Lightning Web Security setting when it detects the access to legacy components such as Aura components in your org. If you enable Lightning Web Security setting, the Genesys Cloud for Salesforce client might not work as expected, as the managed package uses some Aura components. Genesys Cloud recommends disabling the Lightning Web Security setting until Salesforce provides support for legacy components.
For more information about the integration, see About Genesys Cloud for Salesforce.