luceos I've done that but apache now refuses to restart, and I get the error
● apache2.service - LSB: Apache2 web server
Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
Drop-In: /lib/systemd/system/apache2.service.d
└─apache2-systemd.conf
Active: failed (Result: exit-code) since Sat 2018-07-07 11:17:05 BST; 1min 3s ago
Docs: man:systemd-sysv-generator(8)
Process: 1712 ExecStart=/etc/init.d/apache2 start (code=exited, status=1/FAILURE)
Jul 07 11:17:05 hexaforum apache2[1712]: * The apache2 configtest failed.
Jul 07 11:17:05 hexaforum apache2[1712]: Output of config test was:
Jul 07 11:17:05 hexaforum apache2[1712]: [Sat Jul 07 11:17:05.527750 2018] [:crit] [pid 1722:tid 140663719065472] Apache is running a threaded MPM, but your PHP Module is not compiled to be threadsaf
Jul 07 11:17:05 hexaforum apache2[1712]: AH00013: Pre-configuration failed
Jul 07 11:17:05 hexaforum apache2[1712]: Action 'configtest' failed.
Jul 07 11:17:05 hexaforum apache2[1712]: The Apache error log may have more information.
Jul 07 11:17:05 hexaforum systemd[1]: apache2.service: Control process exited, code=exited status=1
Jul 07 11:17:05 hexaforum systemd[1]: Failed to start LSB: Apache2 web server.
Jul 07 11:17:05 hexaforum systemd[1]: apache2.service: Unit entered failed state.
Jul 07 11:17:05 hexaforum systemd[1]: apache2.service: Failed with result 'exit-code'.
lines 1-18/18 (END)
When running sudo systemctl status apache2
