Apart from belog (see above) I found the following problems:
1) after initial login, the "welcome screen" is totally empty (void grey area)
2) View module:not working: it does not load the page (void grey area, see Cattura.png)
3) Workspace module:not working: it does not load the page (void grey area, see 2) )
4) Recycler module:not working: it does not load the page (void grey area, see 2) )
5) Filelist module:not working: it does not load the page (void grey area, see see Cattura2.png )
6) Extension Manager module: not working, error message:
Sorry, the requested view was not found.
The technical reason is: No template was found. View could not be resolved for action "index" in class "TYPO3\CMS\Extensionmanager\Controller\ListController".
7) Languages module:not working: it does not load the page (void grey area, see 2) )
8) Access module: not working; error message:
Sorry, the requested view was not found.
The technical reason is: No template was found. View could not be resolved for action "index" in class "TYPO3\CMS\Beuser\Controller\PermissionController".
9) Backend Users module:not working: it does not load the page (void grey area, see 2) )
10) Log module: not working, see initial issue description
11) Reports module:not working: it does not load the page (void grey area, see 2) )
12) All manuals: not working: it does not load the page (void grey area, see 2) )