File Type Is Not Permitted – WordPress 4.9.9 and 5.0.1

file type is not permitted

Recently updated to WordPress 4.9.9 or 5.0.1 and your CSV file imports for Store Locator Plus® stopped working? It is now fairly common to see a “file type is not permitted” error when uploading files. You can thank yet another “WordPress security feature” — also known as “backwards compatibility break”.  This “update” came with absolutely no warning to plugin developers.

WordPress 4.9.9 and 5.0.1 break Store Locator Plus® Imports and thousands of other plugins.

This does not affect our Store Locator Plus® SaaS users thanks to our fully managed software stack, so they can rest easy and continue to import locations.