It is possible situation when blockchain is not advanced for more than k slots.
In this case we should generate it. Use cardano-auxx and command generate-blocks for it.
Launch cardano-auxx:
$ stack exec -- cardano-auxx \
--system-start 0 \
--configuration-file node/configuration.yaml \
--configuration-key mainnet_full \
--db-path some-db \
repl
Then ensure you have all the needed keys imported (see add-key and
add-key-pool commands). Next is running generate-blocks <N> command, where
<N> is number of blocks to generate. Transaction payload generation is
disabled by default.