error 500 after upload plugin or languaje

[MataVirgenes]

if you have error 500 after upload plugin or language in admin cp, like this:

http://www.domain.com/admin/?adsess=29feb8985ba3e8d72847171faf9a79f0&app=core&module=applications&controller=plugins&do=doInstall&file=/tmp/IPSqL0t2m&key=85de6c8d91c9e7ce374991fa56a8dd78

solution is deleted all content in datastore (include .htaccess), except index.html.