Hi Barak Egoz,
Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.
We understand from your query that you are experiencing an issue while trying to create new vm image in compute gallery.
- Publishing your Virtual Machine images to Azure Marketplace from your Azure Compute Gallery requires you to set permissions so that that Partner Center can acquire the images hosted within your gallery.
- Your Azure Compute Gallery must be in the same Microsoft Entra tenant that's linked to your Partner Center account
- You must be an Owner of the subscription where the Compute Gallery is present.
- Check the Image name, Image version and Image Configuration.
- Azure role-based access control (Azure RBAC) has several Azure built-in roles that you can assign to users, groups, service principals, and managed identities. Role assignments are the way you control access to Azure resources.
Please follow the below document for your reference:
https://learn.microsoft.com/en-us/azure/virtual-machines/capture-image-portal
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If you have any further queries, please let us know we are glad to help you.