"Omeka S encountered an error"nothing in the log!

i have omeka-s-beta4 installed, (i’ve migrate from omeka-s)
you can see it here :https://skylab.inha.fr/omeka-s-beta4/

now i can use admin dashboard, all working find…
exept, i can’t see my web sites, when i click on “view” i have "Omeka S encountered an error"
and in my log file only : 2017-07-05T14:52:54+00:00 ERR (3):

how can i debug this problem ?
thank a lot

Have you turned your .htaccess into development mode as described in the doc?

If so, does your server accept PHP ini_set() instructions?

Hi Pols12 and thank for your help
i’ve turn to development mode and now i can see the error


Fatal error: Call to a member function getMessage() on null in /var/www/html/omeka-s-beta4/application/view/error/index.phtml on line 6

i dont’t understand
in my instance omeka-s i’ve no Zend directory in application/librairies and all sites works fine
in omeka-s-beta4 instance the same (no Zend directory) but i can’t use “view” for all sites

many a problem with modules…


Is this the full message?

Zend namespace is used by Zend framwork which is in ./vendor/zendframework/ but your problem don’t come from there.

The error page is displayed whereas no exception is thrown.

Try to disable all your modules and reactivate them one by bone, in order to detect which module produce this error.

in fact i have an PHP error when i use “view” button

PHP Fatal error: Call to a member function getMessage() on null in /var/www/html/omeka-s-beta4/application/view/error/index.phtml on line 6,


it’s OK, all works fine now…
the problem was with the theme (default and others…)
i have re-installed all the themes, after downloading them…
that’s all…

thank for your help