# Installation fails when Generating optimized autoload files

**URL:** <https://forum.shopware.com/t/installation-fails-when-generating-optimized-autoload-files/72914>\
**Category:** Installation / Getting Started (EN)\
**Created:** [20. Februar 2021 um 10:15 UTC](https://forum.shopware.com/t/installation-fails-when-generating-optimized-autoload-files/72914 "2021-02-20T10:15:33Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![openmindculture](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.shopware.com/openmindculture/32/8658_2.png) [@openmindculture](https://forum.shopware.com/u/openmindculture)\
**Post date:** [20. Februar 2021 um 10:15 UTC](https://forum.shopware.com/t/installation-fails-when-generating-optimized-autoload-files/72914/1 "2021-02-20T10:15:33Z")

</div>

Edit: **these warnings are NOT FATAL.** See my comment below!

When trying to install Shopware 6.1 community edition on a shared host, installation stops with the warning.

```
MatrixStatsAggregation.php does not comply with psr-4 autoloading standard

```

System information:

```
FreeBSD 12.1-RELEASE-p2 GENERIC
PHP 7.2.30 (cli) (built: Apr 22 2020 15:03:18) ( NTS )
Zend Engine v3.2.0
Composer version 1.10.0 2020-03-10 14:08:05

```

What I did:

```
git clone --branch=6.1 https://github.com/shopware/production shopware
cd shopware/
composer install

```

Installation proceeded successfully until after the guzzlehttp deprecation warning, when it starts to

```
Generating optimized autoload files

```

where it stops with this error message:

```
Deprecation Notice: Class ONGR\ElasticsearchDSL\Aggregation\Matrix\MaxAggregation located in ./vendor/ongr/elasticsearch-dsl/src/Aggregation/Matrix/MatrixStatsAggregation.php does not comply with psr-4 autoloading standard. It will not autoload anymore in Composer v2.0. in phar:///usr/local/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:185
Deprecation Notice: Class HTMLPurifier_Language_en_x_test located in ./vendor/ezyang/htmlpurifier/library/HTMLPurifier/Language/classes/en-x-test.php does not comply with psr-0 autoloading standard. It will not autoload anymore in Composer v2.0. in phar:///usr/local/bin/composer.phar/src/Composer/Autoload/ClassMapGenerator.php:185
Killed

```

&nbsp;

---

<div class="post-metadata">

**Author:** ![openmindculture](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.shopware.com/openmindculture/32/8658_2.png) [@openmindculture](https://forum.shopware.com/u/openmindculture)\
**Post date:** [20. Februar 2021 um 10:29 UTC](https://forum.shopware.com/t/installation-fails-when-generating-optimized-autoload-files/72914/2 "2021-02-20T10:29:50Z")

</div>

This is a false positive. There must have been another reason for the killed process.

The warnings are not fatal at all.

A second try of composer install got past these warnings without a problem.