Please follow these steps sequentially:

Step 1: Verify Login
Make sure you are logged into the DraftSight website using your 3DEXPERIENCE ID before attempting to submit any requests or tickets.

If you do not have valid 3DEXPERIENCE ID please create one using steps provided in below post: https://www.3ds.com/support/new-to-support/new-customers-resources/3dexperience-id-creation  

Step 2: Clear Browsing Data

- Open your preferred web browser (e.g., Google Chrome or Microsoft Edge).

- Navigate to:
Settings > Privacy and security > Clear browsing data

- Choose to clear Browsing history,Cookies and other site data,Cached images and files

- Restart your browser.

- Attempt to submit the ticket using: 

Step 3: Reset Browser Settings

- Open your web browser.

- Go to:Settings > Reset settings

- Select "Restore settings to their original defaults".

- Confirm the reset.

- Restart the browser.

-  Try submitting the ticket again.

Step 4: Use Incognito Mode
If the issue still occurs:

- Open your browser in Incognito (Private) Mode.

- In Chrome/Edge: Click the three-dot menu > "New Incognito Window" or "New InPrivate Window".

- Go to the DraftSight website.

- Log in with your 3DEXPERIENCE ID.

- Attempt to submit the ticket again.