See https://helpdesk.sherweb.com/a/solutions/articles/67000724435?lang=en&portalId=67000072402
Symptoms
Sherweb needs to be added as a Foreign Principal to manage your subscriptions. If this is missing, you can follow the steps below to add it.
Resolution
The steps below are performed in PowerShell and can be done from any computer. If the Azure PowerShell module is not installed, it can be installed with the following command:
Install-Module -Name Az -Force
Run the following three commands in PowerShell replacing CSP_TENANT_NAME and CSP_SUBSCRIPTION_ID with the correct values:
Connect-AzAccount -TenantID CSP_TENANT_NAME
Set-AzContext -SubscriptionID CSP_SUBSCRIPTION_ID
New-AzRoleAssignment -ObjectID "c3e7caf0-c590-4086-9467-abbcd2d62e58" -RoleDefinitionName "Owner" -Scope "/subscriptions/CSP_SUBSCRIPTION_ID"