Cant acces after reinstall

Hello,
i have desinstalled the focus template.
I have reinstalled it.
I cant see it in template manager /styles but i see it on template manager/templates.
If i click on details and files, i get this error :
Fatal error: Call to a member function get() on a non-object in /XXXXXX/plugins/system/t3/includes/core/t3.php on line 122

Any idea?

Regards

Hi,
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About your problem, please send me your accout and hosting account.
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