Fatal error when I upload plug-in

Question

When i upload a plug-in, i get the error below. At other plug-ins, i get different fatal error. My release is 1.9.2.3 and I cant upload plug-ins.

Fatal error: Class 'SSTech_Ordertracking_Helper_Data' not found in /home/jellysepeti/public_html/app/Mage.php on line 547

Answer 1

Try clearing cache and check again.
Then check if the file Data.php is present inside app/etc/[local or community]/SSTech/Ordertracking/Helper/
Then check if the helper configuration is there in the app/etc/[local or community]/SSTech/Ordertracking/etc/config.xml or not.

Answer 2

First try to clean your cache files in var/cache/* . It seems like SSTech/Ordertracking/Helper/Data.php has not been found. Make sûre the file exist

Answer 3

Also check if Compilation is enabled and if it is - disable it. You can do this:

1. in the admin panel -> System -> Tools -> Compilation -> Disable

or

2. in the files - includes/config.php - comment all lines (i.e. #define...)