[gelöst]The file "./composer.json" is not readable.

Ist composer.json eine Textdatei, die man editieren kann?
Was wird Dir in der Shell angezeigt, wenn Du ls -la composer.json aufrufst?
Stimmt die interne Struktur vom composer.json, sprich sind alle Kommata und geschweiften Klammern richtig gesetzt?
Ohne diese Informationen wird man Dir nicht weiter helfen können.

inhaltlich habe ich an der Datei nichts geändert und vorher hat sie funktioniert.
Schick sie gerne zur Ansicht mit.

{
"name": "drupal/recommended-project",
"description": "Project template for Drupal 8 projects with a relocated document root",
"type": "project",
"license": "GPL-2.0-or-later",
"homepage": "https://www.drupal.org/project/drupal",
"support": {
"docs": "https://www.drupal.org/docs/user_guide/en/index.html",
"chat": "https://www.drupal.org/node/314178"
},
"repositories": [
{
"type": "composer",
"url": "https://packages.drupal.org/8"
}
],
"require": {
"composer/installers": "^1.2",
"drupal/block_class": "^1.3",
"drupal/bootstrap": "^3.23",
"drupal/bootstrap_layouts": "^5.2",
"drupal/bootstrap_library": "^1.15",
"drupal/bootstrap_paragraphs": "^2.0@beta",
"drupal/captcha": "^1.2",
"drupal/checklistapi": "^1.11",
"drupal/classy_paragraphs": "^1.0@RC",
"drupal/colorbox": "^1.10",
"drupal/core-composer-scaffold": "^8.8",
"drupal/core-project-message": "^8.8",
"drupal/core-recommended": "^8.8",
"drupal/ctools": "^3.7",
"drupal/dropdown_language": "^2.7",
"drupal/ds": "^3.13",
"drupal/entity_browser": "^2.6",
"drupal/entity_class_formatter": "^1.3",
"drupal/entity_reference_revisions": "^1.9",
"drupal/entity_usage": "^2.0@beta",
"drupal/field_formatter_class": "^1.6",
"drupal/field_group": "^3.2",
"drupal/flexslider": "^2.0",
"drupal/font_field_icon": "^1.1",
"drupal/fontawesome": "^2.19",
"drupal/fontawesome_menu_icons": "^1.9",
"drupal/hreflang": "^1.1",
"drupal/iconset": "^1.0@beta",
"drupal/inline_entity_form": "^1.0@RC",
"drupal/languageicons": "^1.0@beta",
"drupal/libraries": "^3.0@beta",
"drupal/media_entity_browser": "^2.0@alpha",
"drupal/menu_link_attributes": "^1.3",
"drupal/menus_attribute": "^1.3",
"drupal/metatag": "^1.16",
"drupal/paragraphs": "^1.12",
"drupal/pathauto": "^1.8",
"drupal/redirect": "^1.6",
"drupal/scheduler": "^1.5",
"drupal/search_api": "^1.21",
"drupal/simple_gmap": "^3.1",
"drupal/simple_sitemap": "^3.11",
"drupal/styleswitcher": "^2.0",
"drupal/superfish": "^1.7",
"drupal/taxonomy_menu": "^3.5",
"drupal/text_resize": "^1.3",
"drupal/token": "^1.9",
"drupal/video_embed_field": "^2.4",
"drupal/views_bootstrap": "^4.3",
"drupal/viewsreference": "^1.8",
"drupal/webform": "^5.27",
"drupal/youtube": "^1.2"
},
"conflict": {
"drupal/drupal": "*"
},
"minimum-stability": "dev",
"prefer-stable": true,
"config": {
"sort-packages": true,
"allow-plugins": {
"composer/installers": true,
"drupal/core-composer-scaffold": true,
"drupal/core-project-message": true
}
},
"extra": {
"drupal-scaffold": {
"locations": {
"web-root": "web/"
}
},
"installer-paths": {
"web/core": [
"type:drupal-core"
],
"web/libraries/{$name}": [
"type:drupal-library"
],
"web/modules/contrib/{$name}": [
"type:drupal-module"
],
"web/profiles/contrib/{$name}": [
"type:drupal-profile"
],
"web/themes/contrib/{$name}": [
"type:drupal-theme"
],
"drush/Commands/contrib/{$name}": [
"type:drupal-drush"
],
"web/modules/custom/{$name}": [
"type:drupal-custom-module"
],
"web/themes/custom/{$name}": [
"type:drupal-custom-theme"
]
},
"drupal-core-project-message": {
"include-keys": [
"homepage",
"support"
],
"post-create-project-cmd-message": [
" ",
" Congratulations, you’ve installed the Drupal codebase ",
" from the drupal/recommended-project template! ",
" ",
"",
"Next steps:",
" * Install the site: https://www.drupal.org/docs/8/install",
" * Read the user guide: https://www.drupal.org/docs/user_guide/en/index.html",
" * Get support: https://www.drupal.org/support",
" * Get involved with the Drupal community:",
" https://www.drupal.org/getting-involved",
" * Remove the plugin that prints this message:",
" composer remove drupal/core-project-message"
]
}
},
"require-dev": {
"drush/drush": "^10.6"
}
}

nach dem dritten Neustart der Shell Verbindung scheint es sich eingekriegt zu haben.
Aber beruhigt bin ich nicht..