Desktop apps powered by Toggl API v8 are no longer functional as of February 15, 2023. If you have one of these apps installed you should be seeing a message saying that the app is no longer supported.
To resolve the issue please download and install the latest version of your desktop app.
Toggl Track is a cloud-based time tracker which means your time should be immediately visible inside the new app. If you notice any un-synced entries in your old desktop app, please move them manually to the new one.
For more information on how each app operates open one of these articles: