SharePoint Online
PSVersion 7.1.0
PnP.PowerShell - 1.7.4

When trying to update Managed Metadata field Set-PnPListItem -List $ListName -Identity $id -Values @{"Field Name" = $TermGUID} -Connection $PnPConnection -UpdateType SystemUpdate -Batch $batch I am getting error with the message:
Message : Object reference not set to an instance of an object.
Stacktrace : at PnP.PowerShell.Commands.Utilities.ListItemHelper.GetFieldValues(IList
list, IListItem existingItem, Hashtable valuesToSet, ClientContext
clientContext, PnPBatch batch)
at PnP.PowerShell.Commands.Lists.SetListItem.ExecuteCmdlet()
at PnP.PowerShell.Commands.PnPSharePointCmdlet.ProcessRecord()