Activation lock

Activation Lock is a theft-deterrance mechanism which intentionally makes stolen devices worthless.

You can read about it here:

https://support.apple.com/en-us/HT201365

If you bought this device from someone else, you MUST get them to remove the lock.

If you have been the owner since it last worked normally, you can remove the lock yourself by following these instructions:

https://support.apple.com/en-us/HT201441

Hard to help if you don't tell us what the problem with the activation lock is? On what device? What's the history? We can't see your machine or read your mind...

Right so. good luck.