"Un problème est survenu. Veuillez réessayer ultérieurement."

Help us. Help you. ​@alexandred28031804 
Sorry to hear you're running into that "Something went wrong" error. Could you provide more information; so, the team can proceed to troubleshoot? Without the requested information it is difficult to assist you and resolve the issue. 

Something went wrong troubleshooting

A Full Screenshot or short video:  Please provide a screenshot of your entire browser or application window, including your avatar in the upper right corner. Many errors have multiple causes; seeing the full context is much more helpful than a zoomed-in image of the error message alone.
>>Make sure to remove person details: email address, name... before posting<<

• System Details: Specify your Operating System (OS) and Browser (including version numbers).
• Workflow Context:
  • Which Firefly function were you using? (e.g., Text to Image, Generative Fill, Text to Video, etc.)
  • Which model was selected? (e.g., Firefly Image 3, Image 4 Ultra, Imagen 3).
  • The full prompt you were using.
  • Copies of any reference images, keyframes, or original images used.

Other suggestions

1. Try a different web browser (or an Incognito/Private window) to rule out browser extensions or cache issues.
2. Disable any active VPN, ad-blockers, or strict firewall settings temporarily.
3. Clear your browser's cache and cookies (see image below):

 For more details and additional troubleshooting steps, you also check this article as well!

Resources & Suggestions on How to Prompt
Generate images from text descriptions
Writing Effective Prompts
Adobe Firefly Resources

Cheers

Nate