[Loris-dev] upgrading centos dev server to v21

[Tom Beaudry]

Hi Guys,

I'm trying to upgrade a dev server to v21 that runs on centos from the
official release.  I followed the instruction on the release page, and I'm
running PHP 7.1.33.

After the upgrade, when i try and access the login page, i get:

This page isn’t workinglorisdev.concordia.ca is currently unable to handle
this request.
HTTP ERROR 500

and my apache logs says:

PHP Parse error:  syntax error, unexpected '?', expecting variable
(T_VARIABLE) in /var/www/loris/php/libraries/NDB_Client.class.inc on line 49

Any help would be greatly appreciated,

Thanks,
Tom
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