If your configuration is ok then you might consider submitting a support ticket. There wasn't much info/details to go off of in your original post. If your MX model allows you to advance beyond MX 18.211.x then you might consider doing so unless limited by Product Firmware Version Restrictions.
If you found this post helpful, please give it Kudos. If my answer solves your problem please click Accept as Solution so others can benefit from it.