If Flow Designer is used to UPDATE or INSERT any records because of which if it does an External Call( From a business rule on those tables) using any of the Web Services it throw following error in the localhost logs:
" No IntegrationHub plugin is available, external calls from the Flow Designer requires IntegrationHub subscription "
IntegrationHub Licensing compliance.
Any external call from Flow Designer requires an IntegrationHub entitlement.
If any customer is doing integrations on business rules on a table that Flow Designer is touching, it requires an IntegrationHub entitlement.
Paid plugin: ServiceNow IntegrationHub Installer need to be installed.