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#1439228111: Cannot set an alias map as the alias loader is not registered! RuntimeException thrown in file [...]/typo3/vendor/typo3/class-alias-loader/src/ClassAliasMap.php in line 59.
Possible Error Sources
Composer install with "--no-scripts" option
Probably you tried to run a composer install/update using the "--no-scripts" option.
composer install --no-scripts
Try to run composer install again without the "--no-scripts" option.