Answer:
1. in compatible adaptor
2. bad cable
3. software issues
4. damaged laptop battery
Explanation:
there are several reasons why this might be happening.
if this message is being displayed it means that the adaptor may not be compatible. this implies that it is spoilt or the laptop just needs to be shutdown. if this fails, then adaptor needs replacing.
the adaptor cable itself may be faulty and needs changing. the laptop's battery may be too old or damaged and needs replacing. also the laptop may be having software issues and needs updating.