Force majeure. TTX May claim things are out of there control soon. Macro events in DRC are not favourable for a fledgling operation like this one. Eastern DRC is a warzone. TTX is close to it. Over 6 million internally displaced people in country. At the same time the company must adhere to a high ethical standard proving its extracted tin and tantulum are conflict free. No easy task.
Typical force majeure events include natural disasters (fire, storms, floods), governmental or societal actions (war, invasion, civil unrest, labor strikes), and infrastructure failures (transportation, energy).