Unable to login in License Manager Tool - blank page

Description

If you are using an older version of an operating system and trying to log in to the License Manager Tool, you might run into an error that causes the login window to go blank. 

This error can happen using the following operating systems:

• macOS 13 or older

• Windows 7 or older

When opening the License Manager Tool from a non-supported operating system it launches the built in, default browser to login. During the login flow, the page will be blank due to a certificate error. Updates for these certificates are usually distributed through regular operating system updates but won’t happen if your operating system is out of support.

Solution

To work around the issue, you should manually update your root certificate.

Follow the steps below to import the trusted certificate:

MacOS

1. Download the certificate from here.

2. Open Keychain Access

   • Open Applications → Utilities → Keychain Access

   • Or use Spotlight (⌘ + Space) and type “Keychain Access”

3. Import the certificate
   You have two options:

   • Option A: Simply drag and drop the .crt or .pem file into the Keychain Access window.

   • Option B: In Keychain Access, go to File → Import Items... and select the downloaded certificate file. When prompted, choose the System keychain (not Login).

4. Trust the certificate.
   Once imported, locate the certificate (search “Sectigo” in the search bar), then double-click it to open its details. Expand the Trust section and set “When using this certificate” → “Always Trust”. Close the window after that and enter your administrator password to confirm.

5. Restart Safari (or your Mac).

6. Quit Safari completely.

7. Reopen it and revisit the site (e.g., https://idproxy.graphisoft.com).

8. The warning should now disappear if everything was installed correctly.

Windows

Option A: Install for the current user only

1. Download the certificate from here.

2. Locate the .crt file on your computer and double-click on it.

3. Start the Certificate Import Wizard by clicking on Install Certificate…

4. In the wizard, select Current User and click Next.

5. Select Place all certificates in the following store.

6. Click Browse…

7. Choose Trusted Root Certification Authorities.

8. Click OK, then Next and then Finish.

9. You should see a message: “The import was successful.”

Option B: Install for all users (requires Admin rights)

1. Right-click the .crt file.

2. Select Install Certificate.

3. Choose Local Machine.

4. If prompted, click Yes to allow the operation.

5. Choose Trusted Root Certification Authorities.

6. Complete the wizard.

7. Confirm successful import.

Option C: Install via MMC (Manual Store Management)

Use this method if Windows refuses automatic placement.

1. Press Win + R

2. Type: mmc then press Enter.

3. Go to File → Add/Remove Snap-in…

4. Select Certificates.

5. Choose Computer account and click Next.

6. Select Local computer and click Finish.

7. Click OK.

8. In the left panel, expand:
   Certificates (Local Computer)
   → Trusted Root Certification Authorities
   → Certificates

9. Right-click Certificates → All Tasks → Import…

10. Browse to your .crt file.

11. Click through Next → Finish.

12. Reopen the certificate manager: certmgr.msc

13. Navigate to Trusted Root Certification Authorities → Certificates.

14. Confirm the certificate appears in the list.