LTE router connection to Mesh network/Router


I have a new Verzion LTE router (ASK-RTL108)  and am trying to connect a TP-Link Deco M5 mesh network to it via ethernet,..   when connected the M5 shows as having an internet connection however no traffic is running across it,..  devices connected to the M5 cannot access the internet,  a speed test within the M5 interface errors out,  etc,...   The LTE router works fine and the ethernet jack works fine if a computer is connected to it.      Is there a compatibility issue with the M5?   Hoping it is just a unique setup issue within the LTE that needs to be addressed,..    Tried adding the M5 to the LTE DMZ with no luck..