More info:
I can access to the trashcan of single workspaces, I get the arror when I try to get the trashcan of all the workspaces.
I have also found that in one of my workspaces I have a .gel file (from the 1.4 when it was freely available) that I can delete forever. I get the error below:
Caught Exception in AutoLoader: exception 'Exception' with message 'Could not find class file for "FRONTCONTROLLER"' in /homepages/3/d229978852/htdocs/fengoffice/environment/classes/AutoLoader.class.php:105 Stack trace: #0 /homepages/3/d229978852/htdocs/fengoffice/environment/classes/AutoLoader.class.php(111): AutoLoader->loadClass('FRONTCONTROLLER') #1 /homepages/3/d229978852/htdocs/fengoffice/application/functions.php(33): AutoLoader->loadClass('FRONTCONTROLLER') #2 /homepages/3/d229978852/htdocs/fengoffice/public/assets/javascript/gelSheet/php/controller/BookController.class.php(15): __autoload('FrontController') #3 /homepages/3/d229978852/htdocs/fengoffice/application/application/models/project_file_revisions/ProjectFileRevision.class.php(420): include_once('/homepages/3/d2...') #4 /homepages/3/d229978852/htdocs/fengoffice/application/controllers/ObjectController.class.php(1646): ProjectFileRevision->delete() #5 /homepages/3/d229978852/htdocs/fengoffice/application/controllers/ObjectController.class.php(1332): ObjectController->do_delete_objects(Array, NULL, true) #6 /homepages/3/d229978852/htdocs/fengoffice/environment/classes/controller/Controller.class.php(76): ObjectController->list_objects() #7 /homepages/3/d229978852/htdocs/fengoffice/environment/classes/controller/PageController.class.php(62): Controller->execute('list_objects') #8 /homepages/3/d229978852/htdocs/fengoffice/environment/classes/Env.class.php(133): PageController->execute('list_objects') #9 /homepages/3/d229978852/htdocs/fengoffice/init.php(149): Env::executeAction('object', 'list_objects') #10 /homepages/3/d229978852/htdocs/fengoffice/index.php(9): require('/homepages/3/d2...') #11 {main}