Apache2 service failed!

Please can you help me with this error, I have no idea how to solve it.

[…] Restarting apache2 (via systemctl): apache2.serviceJob for apache2.service failed because the control process exited with error code.
See “systemctl status apache2.service” and “journalctl -xe” for details.

As the error message says:

systemctl status apache2

Or better:

systemctl status apache2 --no-pager -l

You can also check Apache2 conf:

apache2ctl configtest