Cannot get WiFi or even routing workung after removing the configuration and updating

That would be Rule #4:

Do you have a ISP connection on ether1?

Remove this (it is likely an artifact of Quickset), it makes no sense:

/ip dhcp-server network
add address=0.0.0.0/24 dns-server=0.0.0.0 gateway=0.0.0.0 netmask=24

Then you want:

  1. a DHCP client on ether1
/ip dhcp-client
add interface=ether1
  1. ether1 categorized as WAN (to make the NAT rule effective):
/interface list member
add interface=ether1 list=WAN
add interface=bridge1 list=LAN
  1. ether1 should be taken OUT of the bridge, i.e.:
/interface bridge port

add bridge=bridge1 interface=ether2
add bridge=bridge1 interface=ether3
add bridge=bridge1 interface=ether4
add bridge=bridge1 interface=ether5
add bridge=bridge1 interface=ether6
add bridge=bridge1 interface=ether7
add bridge=bridge1 interface=ether8
add bridge=bridge1 interface=wifi1
  1. You seemingly have NO firewall configured, this is really deprecated, Rule #8, unless you have an ISP router or similar with a firewall between the L009 and internet you should not connect the device to internet until you have copied and pasted the default Mikrotik firewall set of rules.