A severe error occurred whilst trying to handle an exception, check the Symphony log for more details Use of undefined constant SYMPHONY_URL - assumed 'SYMPHONY_URL' (this will throw an Error in a future version of PHP) on 338 of file C:\laragon\www\symphony\symphony\lib\core\class.errorhandler.php
Hi @Sahasrahla, yes, due to high spam ratio, registrations on the Symphony forum has been closed and switched to Gitter.
For your issue: It's not about the Symphony and PHP version only, it's also about the installed extensions.
So make a sheet with all installed extionsions and figure out, what is the current version of the extension and – thats important – exists the extionsion for Symphony yet.
The current 2.x version of Symphony is 2.7.7 and it's a LTS version.
You can find an overview of the supported extensions here: