you can try:
Check VM Status: Ensure that the VM is in a deallocated state before attempting to start it. If the VM is in a running or deallocation in progress state, you may need to wait for the process to complete before you can start it again.
Insufficient Resources: Check if you have enough available resources (such as CPU, memory, or storage) in your Azure subscription to start the VM. If you have reached your resource limits, you might need to deallocate or delete other resources to free up space.
Resource Locks: Verify if any resource locks are applied to the VM or any associated resources. Resource locks can prevent starting or stopping the VM. Remove any locks that might be interfering with the VM's operation.
Capture Issues: If the VM capture process encountered any errors or issues, it could potentially affect the ability to start the VM. Review the capture process logs or any error messages that were generated during the capture to identify potential problems.
Network Connectivity: Check if there are any networking issues that could be preventing the VM from starting. Ensure that the necessary network resources, such as virtual networks and subnets, are available and properly configured.
Review Activity Logs: Examine the activity logs in the Azure portal to identify any specific errors or warnings related to the VM start operation. The logs may provide additional information about the underlying problem.