Same problem here. Had to add a new site in Local and then complete a restore. Luckily i had a recent backup to restore.
Router mode = localhost
I am back up and working as normal.
Local Flywheel Developers, Same identical problem and solution happen when I upgraded in Aug 2019 (??). Do not remember which version I upgraded from or to.
Yeah. Ended up doing the same thing … sucks though, this shit shouldn’t happen at this stage of development! Fortunately, backup, backup, backup saves the day … still sucks.