Composer upgrade after upgrading core to 8.6.15

composer_output.txt

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - The requested package doctrine/common could not be found in any version, there may be a typo in the package name.
  Problem 2
    - The requested package doctrine/annotations could not be found in any version, there may be a typo in the package name.
  Problem 3
    - The requested package zendframework/zend-feed could not be found in any version, there may be a typo in the package name.
  Problem 4
    - The requested package doctrine/common could not be found in any version, there may be a typo in the package name.
  Problem 5
    - The requested package symfony/dependency-injection could not be found in any version, there may be a typo in the package name.
  Problem 6
    - The requested package symfony/dependency-injection could not be found in any version, there may be a typo in the package name.
  Problem 7
    - The requested package symfony/http-foundation could not be found in any version, there may be a typo in the package name.
  Problem 8
    - The requested package symfony/validator could not be found in any version, there may be a typo in the package name.
  Problem 9
    - The requested package paragonie/random_compat could not be found in any version, there may be a typo in the package name.
  Problem 10
    - The requested package symfony/polyfill-iconv could not be found in any version, there may be a typo in the package name.