I had the same err-message this morning, in my case i did the following and fixed.
(config)#controller vdSL 0
(config-controller)#operating MOde adsl2+
there are other options under this tab, apply the one fits your SP line or try all 1 by 1 till its up-up
adsl1 ITU G.992.1 adsl2 ITU G.992.3 adsl2+ ITU G.992.5 ansi ANSI T1.413 auto auto detect mode vdsl2 ITU G.993.2
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