You mentioned in the other topic:
That this all started with an update to Mojave. I wonder if something became corrupted in the upgrade process?
You might try backing up each site in Local by right-clicking it and selecting “Export”. This will give you a zip of each site. From there, try completely uninstalling Local by following the steps in this help doc:
Once that’s done, re-install Local and import the backups you made by dragging and dropping the zip files onto Local.