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17 changes: 17 additions & 0 deletions user_guide_src/source/installation/upgrade_430.rst
Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,23 @@ Please refer to the upgrade instructions corresponding to your installation meth
:local:
:depth: 2

Trouble Shooting
****************

Call to undefined method Composer\InstalledVersions::getAllRawData()
====================================================================

Some users reported "*Fatal error: Uncaught Error: Call to undefined method Composer\InstalledVersions::getAllRawData()*" after upgrading with Composer.

If you get the error, upgrade your ``composer`` tool, and delete the **vendor/**
directory, and run ``composer update`` again.

The procedure, for example, is as follows::

> composer self-update
> rm -rf vendor/
> composer update

Mandatory File Changes
**********************

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