How to make VLAN work again after update from TOS 5 to 6?

Delete all the bridges you have created, except the br-lan.
Then do something like this:

Do not hit the Save & Apply button yet, go back to Interfaces and update the LAN interface with the correct interface name (in my case default is VLAN 1), like this:

And that’s it. Hit Save & Apply and wait for the settings to be applied.

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