From their YouTube community page:

Hello, this is CITYBOY_LOG. First and foremost, we would love to express our heartfelt gratitude to CILUVs for your love and patience in waiting for new vlogs over a long period. Thanks to you, our content has been greatly loved, and in return for your constant support, we are currently taking some time to reorganize in order to provide higher quality content. We have been considering what content CILUVs would enjoy, which has led to some delays than initially planned. We ask for your understanding in this delay, and we promise that this wait will not be in vain as we aim to return with even better content than before. Thank you for your patience, and we will provide more detailed information about our schedule in a future announcement. Thank you.