I updated the site locally to 3.1.27 (it is working fine) and moved the vendor files, composer.lock and composer.json to the server.
After the update, I went to the admin and clicked on the "finish up" button. On reload the server crashed with the following errors:
18-May-2019 18:42:16 America/Los_Angeles] PHP Warning: require(C:\home\site\vendor\composer/../symfony/polyfill-intl-idn/bootstrap.php): failed to open stream: No such file or directory in C:\home\site\vendor\composer\autoload_real.php on line 66
The File "C:\home\site\vendor\composer/../symfony/polyfill-intl-idn/bootstrap.php" is on the server.
I've reuploaded the vendor files as well as the composer.json and composer.lock. Not sure what else to do. Any ideas?