Problem is a bug in the class-wc-legacy-rest-api-plugin.php, row 102:
private function hpos_is_enabled()
has to be a private static function hpos_is_enabled()
File is located in wp-content/plugins/woocommerce-legacy-rest-api/includes/class-wc-legacy-rest-api-plugin.php
Another way to get the website online is to remove the plugin temporary via FTP / SFTP / SSH, reload the page and copy it back into the plugin folder. WordPress will automatically disable the plugin. But that is not the best solution in case the API is still in use and may break things that depend on it.
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This reply was modified 6 months, 1 week ago by mfeilen.