Using ACF JSON on WordPress multisite installations
ACF JSON can get a little messy where you need different field groups across your sub-sites. If you are using separate
themes or separate child themes for each sub-site, you'll be fine as long as each theme/child-theme has its own /acf-json
directory.
If, however, you want to enforce unique acf-json directories for each sub-site, you can do so using one of the following snippets.