I have faced the following issues in new dpdk 22.11 released version:

testpmd> port config 0 speed 100 duplex half
Please stop port 0 first
dpdk 22.11 error: please stop port 0 first dpdk even though it's already
stopped!

same for :
testpmd> port config 0 tx_offload vlan_insert on
Error: Can't config offload when Port 0 is not stopped
testpmd> stop
Packet forwarding not started
testpmd> port config 0 tx_offload vlan_insert on
Error: Can't config offload when Port 0 is not stopped

regards,
-- 
*Engr. Khadem Ullah *
Research Assistant at National Center Of Big Data and Cloud Computing,
University Of Engineering and Technology Peshawar (NCBC-UETP) Pakistan