# Troubleshooting
## The Trust1Connector certificate has expired
The Trust1Connector is designed to automatically renew its certificate if expired, or re-create it if missing. Should the process of renewing an existing certificate fail however, the following steps can be undertaken to remedy it:
### Windows
1. Open the Windows Certificate Manager (`certmgr.exe`):
2. Locate the expired Trust1Connector certificate by right-clicking on the top-level item `Certificates - Local Computer` and searching for `localhost` or `trust1connector` (depending on the installed version):
3. If the search yields multiple results, select the certificate past its expiration date: 
4. Right-click the expire certificate, select `Delete` and confirm the deletion action: 
5. Once the certificate is deleted, restart your computer. At the next startup, a new certificate will have been generated.
### Mac OS
1. Open the Mac OS Keychain Access by pressing `⌘ + space` and typing its name:
2. Look under `Certificates` and select the expired certificate with the name `localhost` or `trust1connector` (depending on the installed version):
3. Right-click the certificate and select the `Delete` action, enter your password when prompted:
4. Restart your device.