Many ways this could play out.A good path would be for SLR to...

Many ways this could play out.
A good path would be for SLR to call in the debt, exercise the lien, and arrange for a prompt mortgagee sale.
SLR would be a buyer, as it would be paying itself.
Perhaps some extra funding to allow the mine to continue as a going concern, but given the supposed labour shortages, and potential new contractor, why bother?
Avoiding getting bogged down in legal issues would be a consideration for discussion with other interested parties.