Tried my first business role in IG and had 11 464 members in the role. I did an initial setup with one role from UA configured as a permission in the business role. When publishing the business role the fulfillment process started an pretty soon I got error messages in the UA catalina log, mostly complaining on too many open files. I did also get some fulfillment errors in IG with messages such as: "Invalid User Application Authentication or Forbidden operation. Validate User Application credentials".
What could be the most likely cause of those errors?