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:100
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:13
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:34

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_5f4210a88b305d0869dc009bc2024c87aa3af2c345f5a1fbcd9b73e5b50fea2c->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_e62bdcae18b9d16a9ad5a2496356d48f6f262c75d4159c1cfcd202d3f0a55a4e->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_e62bdcae18b9d16a9ad5a2496356d48f6f262c75d4159c1cfcd202d3f0a55a4e->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_e77fc89c5c7b149e8ee86387543abb5a5b22cfc06368df4d16e6acff6d2a9b00->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_e63fddc3596f202037ba625886185574464e03136f24631d9108f9eaf4339af1->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_e62bdcae18b9d16a9ad5a2496356d48f6f262c75d4159c1cfcd202d3f0a55a4e->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_902b6051c3c31e6824557c94fa7650e5bd5ba6e9eb14116a3aa6357805ce668f->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:100
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:13
IServ\Portal\Application\Application->process(IServ\Portal\Application\ApplicationRequest)