We've had several reports from members receiving error messages beginning with "Error: cvc-complex-type.3.2.2: Attribute 'xml:lang' is not allowed to appear in element 'jats:abstract'." after today's v0.152.0 release. We believe we have a temporary fix in place, but if you receive an error like the one above for any of your registrations, please do contact us at support@crossref.org.