Metamodels zugriff auf einmal fehlerhaft dank Composer?!

Hallo ,
ich habe eine Contao 3.5.9 installation mit Metamodels erfolgreich am laufen seit ca. 1,5 Jahren. Metamodels habe ich via composer installiert gehabt (jedoch nicht das Bundle - sondern einzeln)
Plötlich kam auf der Startseite eine Fehlermeldung (gemischt mit dem layout) das ein Fehler aufgetreten sei.

WEnn ich im Admin auf Metamodels klicke - kommen meine 3 MM aber alle icons sind verschwunden - zudem kann ich auf die Icons zur Verwaltung der MM nicht mehr zugreifen - es kommt eine weisse seite.
Aus dem errorlog werde ich auch nicht schlau. Ich hatte das Problem schon mal - habe dann ein Backup eingespielt und dann ging es wieder. Jetzt nach gut einem Monat ist das Problem wieder da.

Laut error Log hat der Composer damit was zu tun. Jedoch keine Ahnung wie ich das fixen soll. Any ideas?! Backup einspielen geht auch nicht mehr...

Code:

[09-Feb-2018 12:21:20 Europe/Berlin] PHP Deprecated notice: The Composer\Package\LinkConstraint\LinkConstraintInterface interface is deprecated, use Composer\Semver\Constraint\ConstraintInterface instead. in phar:///is/htdocs/wp333333333/www/web/composer/composer.phar/src/Composer/Package/LinkConstraint/LinkConstraintInterface.php on line 17 #0 [internal function]: __error(16384, 'The Composer\\Pa...', 'phar:///is/htdo...', 17, Array) #1 phar:///is/htdocs/wp333333333/www/web/composer/composer.phar/src/Composer/Package/LinkConstraint/LinkConstraintInterface.php(17): trigger_error('The Composer\\Pa...', 16384) #2 /is/htdocs/wp333333333/www/web/vendor/composer/ClassLoader.php(412): include('phar:///is/htdo...') #3 /is/htdocs/wp333333333/www/web/vendor/composer/ClassLoader.php(301): Composer\Autoload\includeFile('phar:///is/htdo...') #4 [internal function]: Composer\Autoload\ClassLoader->loadClass('Composer\\Packag...') #5 phar:///is/htdocs/wp333333333/www/web/composer/composer.phar/src/Composer/Package/LinkConstraint/VersionConstraint.php(23): spl_autoload_call('Composer\\Packag...') #6 /is/htdocs/wp333333333/www/web/vendor/composer/ClassLoader.php(412): include('phar:///is/htdo...') #7 /is/htdocs/wp333333333/www/web/vendor/composer/ClassLoader.php(301): Composer\Autoload\includeFile('phar:///is/htdo...') #8 [internal function]: Composer\Autoload\ClassLoader->loadClass('Composer\\Packag...') #9 /is/htdocs/wp333333333/www/web/system/modules/!composer/src/Controller/InstalledController.php(219): spl_autoload_call('Composer\\Packag...') #10 /is/htdocs/wp333333333/www/web/system/modules/!composer/src/Controller/InstalledController.php(97): ContaoCommunityAlliance\Contao\Composer\Controller\InstalledController->buildGroupedPackagesList(Object(Composer\Package\RootPackage), Object(Composer\Repository\InstalledFilesystemRepository), Array, Array, Array) #11 /is/htdocs/wp333333333/www/web/system/modules/!composer/src/ClientBackend.php(218): ContaoCommunityAlliance\Contao\Composer\Controller\InstalledController->handle(Object(Contao\Input)) #12 /is/htdocs/wp333333333/www/web/system/modules/core/classes/Backend.php(423): ContaoCommunityAlliance\Contao\Composer\ClientBackend->generate() #13 /is/htdocs/wp333333333/www/web/system/modules/core/controllers/BackendMain.php(131): Contao\Backend->getBackendModule('composer') #14 /is/htdocs/wp333333333/www/web/contao/main.php(20): Contao\BackendMain->run() #15 {main} [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: COMPOSER_OUTPUT in /is/htdocs/wp333333333/www/web/system/modules/!composer/src/Controller/InstalledController.php on line 108 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: TL_ERROR in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Message.php on line 131 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: TL_CONFIRM in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Message.php on line 131 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: TL_NEW in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Message.php on line 131 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: TL_INFO in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Message.php on line 131 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: TL_RAW in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Message.php on line 131 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: HTTP_X_FORWARDED_HOST in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Environment.php on line 302 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: SSL_SESSION_ID in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Environment.php on line 313 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: HTTPS in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Environment.php on line 313 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: HTTPS in /is/htdocs/wp333333333/www/web/system/modules/core/library/Contao/Environment.php on line 313 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined offset: 1 in /is/htdocs/wp333333333/www/web/system/modules/core/classes/BackendUser.php on line 560 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined offset: 1 in /is/htdocs/wp333333333/www/web/system/modules/core/classes/BackendUser.php on line 560 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined offset: 1 in /is/htdocs/wp333333333/www/web/system/modules/core/classes/BackendUser.php on line 560 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: class in /is/htdocs/wp333333333/www/web/system/modules/core/templates/backend/be_main.html5 on line 81 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: class in /is/htdocs/wp333333333/www/web/system/modules/core/templates/backend/be_main.html5 on line 81 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: class in /is/htdocs/wp333333333/www/web/system/modules/core/templates/backend/be_main.html5 on line 81 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: class in /is/htdocs/wp333333333/www/web/system/modules/core/templates/backend/be_main.html5 on line 81 [09-Feb-2018 12:21:20 Europe/Berlin] PHP Notice: Undefined index: 8ebd8d9e in /is/htdocs/wp333333333/www/web/system/modules/core/classes/BackendUser.php on line 127

hier noch ein screenshot der paketverwaltung:Anhang 20494
Danke und Gruss
GAssi