Accessory not supported showing

last one month I had faced a problem which is that, in charging moment my iPhone showing that “This accessory may not be supported” & disconnects charging.

but I’m using my genuine Apple adapter, apple charger cable.

but nowadays I can’t charge my phone fully. It is disconnected within 3 or 4 minutes later. In a couple of weeks I’m using an android adapter (Samsung adapter) & my battery health decrease 3%.

whats the problem & solution about my Apple adapter.