After installation on xampp , in to login link, when i click on this link, some errors were occured

[tahasoltany]

After installation on xampp , in to login link, when i click on this link, some errors were occured.
the text of errors is as below :
"An error was detected which prevented the loading of this page. If this problem persists, please contact the website administrator."
"C:/xampp/htdocs/Ushahidi/application/controllers/admin/dashboard.php [116]:
Non-static method protochart::chart() should not be called statically, assuming $this from incompatible context"

i saw similar errors when i clicked on other next steps links such as :

"An error was detected which prevented the loading of this page. If this problem persists, please contact the website administrator.
C:/xampp/htdocs/Ushahidi/themes/default/views/header_nav.php [17]:
Non-static method html::escape() should not be called statically, assuming $this from incompatible context"

and

"An error was detected which prevented the loading of this page. If this problem persists, please contact the website administrator.
C:/xampp/htdocs/Ushahidi/application/controllers/admin/settings.php [534]:
Non-static method Settings_Model::get_settings() should not be called statically, assuming $this from incompatible context"

i use the latest Ushahidi_web (2.7.4) on my local PC
what is the reason of this problem?
what is the best configuration to run this app with minimal bugs ? (xampp , wamp, win, linux or etc???)