Dropbox Troubleshooting (macOS Monterey)
If using Dropbox to store your Scrivener projects on macOS Monterey, you may encounter an error stating that some of the project's files or contents are not accessible, or that the project "seems to be of an older format, but no binder.scrivproj file could be found inside it." These errors may indicate that you need to adjust your Dropbox Smart Sync settings so that your project is stored locally within your Dropbox folder rather than in online storage.
First, please open up a Finder window and select your Dropbox folder in the left-hand sidebar. Right-click or Control+Click on the folder where your Scrivener projects are stored.
You will want to select
Smart Sync ▸ Local in the list of Dropbox services near the bottom of the menu that opens. That will force Dropbox to download all of the contents of that folder to your Mac's local storage.
Once Dropbox has finished downloading your project to local storage, you should see a green checkmark on the file.
You may also want to review your Dropbox settings to confirm whether new files are stored automatically for online-only storage or are kept locally on your computer. To do this, go to the Dropbox icon in your Mac's menu bar and select your user ID and then select Preferences.
In the pop-up window that opens, select the Sync tab and review your settings in the Files added on web default dropdown menu.
You can also click the Select Folders button and choose which folders are kept in local storage if you want to keep only a few items locally.