Would you please share more detail about the PowerApps usage?
Which account you used to login with PowerApps, which template that popped out the error message?
Generally when using the template, it will create connections for storage files based on the online storage account you provided (OneDrive for business, OneDrive or Box Storage Services), I think the issue here should be mostly related with the storage account. Please take a look at the storage account you used. Verify the connections in PowerApps and the storage under that account.