# Fatal Error after ant build-unit

**URL:** <https://forum.shopware.com/t/fatal-error-after-ant-build-unit/63977>\
**Category:** Installation / Getting Started (EN)\
**Created:** [13. Januar 2020 um 17:09 UTC](https://forum.shopware.com/t/fatal-error-after-ant-build-unit/63977 "2020-01-13T17:09:38Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![ShopwareNooby](https://avatars.discourse-cdn.com/v4/letter/s/9de0a6/32.png) [@ShopwareNooby](https://forum.shopware.com/u/ShopwareNooby)\
**Post date:** [13. Januar 2020 um 17:09 UTC](https://forum.shopware.com/t/fatal-error-after-ant-build-unit/63977/1 "2020-01-13T17:09:38Z")

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Hi everybody,&nbsp;

after i enter the “ant buid-unit” command i get this Error:

“Fatal error: Uncaught TypeError: Return value of PackageVersions\Installer::activate() must be an instance of PackageVersions\void, none returned in /home/vagra”

Could you please help me to solve this problem?

Best regards&nbsp;

Vanessa

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**Author:** ![timbrns](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.shopware.com/timbrns/32/19740_2.png) [@timbrns](https://forum.shopware.com/u/timbrns)\
**Post date:** [17. Februar 2020 um 12:42 UTC](https://forum.shopware.com/t/fatal-error-after-ant-build-unit/63977/2 "2020-02-17T12:42:01Z")

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Hi Vanessa,

which PHP Version are you running on your system?  
Did you check whether your system has all requirements to install shopware?

Kind regards,  
Tim