[Resolved] Fatal error dopo aggiornamento WPML Multilingual CMS

Contesto del problema:
Sto cercando di aggiornare il plugin WPML Multilingual CMS. L'errore si è presentato quando abbiamo avviato l'aggiornamento del plugin. Il back end del sito è inaccessibile, ma abbiamo una copia di backup.

Sintomi:
il seguente plug-in: WPML Multilingual CMS genera il seguente errore:

An error of type E_ERROR was caused in line 422 of the file /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/Injector.php. Error message: Uncaught ReflectionException: Class "WPMLStringTranslationInfrastructureTranslateEverythingUntranslatedStringsFactory" does not exist in /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/StandardReflector.php:29 Stack trace: #0 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/StandardReflector.php(29): ReflectionClass->__construct('WPMLStringTran...') #1 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/CachingReflector.php(73): WPMLAurynStandardReflector->getParamTypeHint(Object(ReflectionMethod), Object(ReflectionParameter)) #2 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/Injector.php(527): WPMLAurynCachingReflector->getParamTypeHint(Object(ReflectionMethod), Object(ReflectionParameter)) #3 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/Injector.php(474): WPMLAurynInjector->buildArgFromTypeHint(Object(ReflectionMethod), Object(ReflectionParameter)) #4 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/Injector.php(414): WPMLAurynInjector->provisionFuncArgs(Object(ReflectionMethod), Array, Array, 'WPMLTMATELoa...') #5 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/Injector.php(373): WPMLAurynInjector->provisionInstance('WPMLTMATELoa...', 'wpmltmateloa...', Array) #6 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/container/class-wpml-container.php(98): WPMLAurynInjector->make('WPMLTMATELoa...', Array) #7 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/container/functions.php(29): WPMLContainerContainer::make('WPMLTMATELoa...', Array) #8 [internal function]: WPMLContainer{closure}('WPMLTMATELoa...') #9 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/functions.php(154): call_user_func_array(Object(Closure), Array) #10 [internal function]: WPMLFP{closure}('WPMLTMATELoa...') #11 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/container/functions.php(35): call_user_func_array(Object(Closure), Array) #12 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/ATE/Loader/MarkPreviouslyUnsupportedContentAsCompletedInTEA.php(66): WPMLContainermake('WPMLTMATELoa...') #13 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/Either.php(207): WPMLTMATELoaderMarkPreviouslyUnsupportedContentAsCompletedInTEA->run(Array) #14 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/Either.php(257): WPMLFPRight->map(Array) #15 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/Promise.php(24): WPMLFPRight->chain(Array) #16 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/wp/classes/Hooks.php(50): WPMLFPPromise->resolve(Object(WPMLFPRight)) #17 /home/pafilect/public_html/wp-includes/class-wp-hook.php(324): WPMLLIBWPHooks::WPMLLIBWP{closure}('') #18 /home/pafilect/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #19 /home/pafilect/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #20 /home/pafilect/public_html/wp-settings.php(749): do_action('wp_loaded') #21 /home/pafilect/public_html/wp-config.php(187): require_once('/home/pafilect/...') #22 /home/pafilect/public_html/wp-load.php(50): require_once('/home/pafilect/...') #23 /home/pafilect/public_html/wp-admin/admin.php(35): require_once('/home/pafilect/...') #24 /home/pafilect/public_html/wp-admin/plugins.php(10): require_once('/home/pafilect/...') #25 {main} Next WPMLAurynInjectionException: Could not make WPMLTMATELoaderMarkPreviouslyUnsupportedContentAsCompletedInTEAStringsAndPackagesMigration: Class "WPMLStringTranslationInfrastructureTranslateEverythingUntranslatedStringsFactory" does not exist in /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/Injector.php:422 Stack trace: #0 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/otgs/auryn/lib/Injector.php(373): WPMLAurynInjector->provisionInstance('WPMLTMATELoa...', 'wpmltmateloa...', Array) #1 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/container/class-wpml-container.php(98): WPMLAurynInjector->make('WPMLTMATELoa...', Array) #2 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/container/functions.php(29): WPMLContainerContainer::make('WPMLTMATELoa...', Array) #3 [internal function]: WPMLContainer{closure}('WPMLTMATELoa...') #4 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/functions.php(154): call_user_func_array(Object(Closure), Array) #5 [internal function]: WPMLFP{closure}('WPMLTMATELoa...') #6 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/container/functions.php(35): call_user_func_array(Object(Closure), Array) #7 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/classes/ATE/Loader/MarkPreviouslyUnsupportedContentAsCompletedInTEA.php(66): WPMLContainermake('WPMLTMATELoa...') #8 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/Either.php(207): WPMLTMATELoaderMarkPreviouslyUnsupportedContentAsCompletedInTEA->run(Array) #9 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/Either.php(257): WPMLFPRight->map(Array) #10 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/fp/core/Promise.php(24): WPMLFPRight->chain(Array) #11 /home/pafilect/public_html/wp-content/plugins/sitepress-multilingual-cms/vendor/wpml/wp/classes/Hooks.php(50): WPMLFPPromise->resolve(Object(WPMLFPRight)) #12 /home/pafilect/public_html/wp-includes/class-wp-hook.php(324): WPMLLIBWPHooks::WPMLLIBWP{closure}('') #13 /home/pafilect/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #14 /home/pafilect/public_html/wp-includes/plugin.php(517): WP_Hook->do_action(Array) #15 /home/pafilect/public_html/wp-settings.php(749): do_action('wp_loaded') #16 /home/pafilect/public_html/wp-config.php(187): require_once('/home/pafilect/...') #17 /home/pafilect/public_html/wp-load.php(50): require_once('/home/pafilect/...') #18 /home/pafilect/public_html/wp-admin/admin.php(35): require_once('/home/pafilect/...') #19 /home/pafilect/public_html/wp-admin/plugins.php(10): require_once('/home/pafilect/...') #20 {main} thrown

Domande:
Ci potete aiutare a sistemare la situazione?
Cosa dobbiamo fare possibilmente senza perdere traduzioni e dati del sito?