Upgrade from PHP71 to PHP72 breaks icingaweb2

[Lars Engels]

On Thu, Nov 08, 2018 at 10:06:15PM +0100, Xavier wrote:
> On 08/11/2018 14:17, Lars Engels wrote:
> > Do you see any php related entries in your apache logs?
> > 
> 
> No, just the stack trace on screen
> 

I just encountered the same problem after upgrading from php71 to php72.
I had to also upgrade mod_php71 to mod_php72 and restart Apache
afterwards. Now Icinga Web 2 is up and running again.