Fatal error: Uncaught exception: 
Error while rendering the template "error.html.twig" in /usr/share/iserv/portal/src/Template/TwigRenderer.php:89

Stack trace:
#0 /usr/share/iserv/portal/src/Module/Response/ResponseFilter.php:377
IServ\Portal\Template\TwigRenderer->render(string, array)
#1 /usr/share/iserv/portal/src/Module/Response/ResponseFilter.php:107
IServ\Portal\Module\Response\ResponseFilter->handleClientAndServerErrorResponse(IServ\Portal\Application\ApplicationRequest, IServ\Portal\Response\HttpResponse, IServ\Module\App\AppModule, IServ\Portal\Menu\MenuViewModel)
#2 /usr/share/iserv/portal/src/Application/Application.php:102
IServ\Portal\Module\Response\ResponseFilter->handle(IServ\Portal\Application\ApplicationRequest, IServ\Module\App\AppModule, IServ\Portal\Menu\MenuViewModel, IServ\Portal\Response\HttpResponse)
#3 /usr/share/iserv/portal/public/index.php:16
IServ\Portal\Application\Application->process(IServ\Portal\Application\ApplicationRequest)


Previous exception
Impossible to access an attribute ("displayName") on a null variable. in /usr/share/iserv/portal/templates/partials/sidebar.html.twig:35

Stack trace:
#0 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php(358) : eval()'d code:73
twig_get_attribute(Twig\Environment, Twig\Source, NULL, string, array, string, boolean, boolean, boolean, integer)
#1 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:396
__TwigTemplate_8c7df56b825d2a404088c8ce652d6f8cb274e2cb3e3d23119667bebefaa53826->doDisplay(array, array)
#2 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:369
Twig\Template->displayWithErrorHandling(array, array)
#3 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php(358) : eval()'d code:172
Twig\Template->display(array)
#4 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:173
__TwigTemplate_f02fc9a2339b99d13993e72c972f7864a778b8e8305bfcd6f6e3c29480718239->block_sidebar(array, array)
#5 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php(358) : eval()'d code:78
Twig\Template->displayBlock(string, array, array)
#6 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:173
__TwigTemplate_f02fc9a2339b99d13993e72c972f7864a778b8e8305bfcd6f6e3c29480718239->block_body(array, array)
#7 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php(358) : eval()'d code:103
Twig\Template->displayBlock(string, array, array)
#8 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:396
__TwigTemplate_d562dac7fae2dd3ab24d572dd8a803f1d6ab6d75cf037596865347fc59377338->doDisplay(array, array)
#9 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:369
Twig\Template->displayWithErrorHandling(array, array)
#10 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php(358) : eval()'d code:44
Twig\Template->display(array, array)
#11 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:396
__TwigTemplate_b8775e7cd77dc50d001c7e992ad6e07bf56423d9c9763aa32d4b314e6cbf3c8c->doDisplay(array, array)
#12 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:369
Twig\Template->displayWithErrorHandling(array, array)
#13 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php(358) : eval()'d code:50
Twig\Template->display(array, array)
#14 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:396
__TwigTemplate_f02fc9a2339b99d13993e72c972f7864a778b8e8305bfcd6f6e3c29480718239->doDisplay(array, array)
#15 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:369
Twig\Template->displayWithErrorHandling(array, array)
#16 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php(358) : eval()'d code:44
Twig\Template->display(array, array)
#17 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:396
__TwigTemplate_5a5a3be5359b9e95b3f08797ecd44914308520b7a8c5580516dd879328392b1e->doDisplay(array, array)
#18 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:369
Twig\Template->displayWithErrorHandling(array, array)
#19 /usr/share/iserv/portal/vendor/twig/twig/src/Template.php:381
Twig\Template->display(array)
#20 /usr/share/iserv/portal/vendor/twig/twig/src/TemplateWrapper.php:40
Twig\Template->render(array, array)
#21 /usr/share/iserv/portal/vendor/twig/twig/src/Environment.php:277
Twig\TemplateWrapper->render(array)
#22 /usr/share/iserv/portal/src/Template/TwigRenderer.php:84
Twig\Environment->render(string, array)
#23 /usr/share/iserv/portal/src/Module/Response/ResponseFilter.php:377
IServ\Portal\Template\TwigRenderer->render(string, array)
#24 /usr/share/iserv/portal/src/Module/Response/ResponseFilter.php:107
IServ\Portal\Module\Response\ResponseFilter->handleClientAndServerErrorResponse(IServ\Portal\Application\ApplicationRequest, IServ\Portal\Response\HttpResponse, IServ\Module\App\AppModule, IServ\Portal\Menu\MenuViewModel)
#25 /usr/share/iserv/portal/src/Application/Application.php:102
IServ\Portal\Module\Response\ResponseFilter->handle(IServ\Portal\Application\ApplicationRequest, IServ\Module\App\AppModule, IServ\Portal\Menu\MenuViewModel, IServ\Portal\Response\HttpResponse)
#26 /usr/share/iserv/portal/public/index.php:16
IServ\Portal\Application\Application->process(IServ\Portal\Application\ApplicationRequest)