We're aware of an issue on EUW that has caused us to disable the dynamic ranked queues. We know that many of you were excited about this feature, and so we want to resolve this as quickly as possible.
In the meantime, we have re-enabled the previous solo/duo queues for those of you who want to continue playing ranked. As of now, Normal Blind Pick, Normal Draft Pick and Ranked Draft Solo/Duo are enabled. EUNE remains unaffected.
Games played during this time will continue to count towards your placements and rating as normal, and these will be carried over when dynamic ranked is re-enabled. We will provide more information for you later today.
Thank you for your patience.