Strict Standards: Non-static method jshoppingTreeCategoriesHelper::getTreeCategory() should not be called statically

Strict Standards: Non-static method jshoppingTreeCategoriesHelper::getTreeCategory() should not be called statically

Hello!
I have problem with Joomshopping Tree Modul. It causes me trouble som times and I have to change in Config-file "Error reporting" from default to '6143'.
Then it works for a while until config-file will change back to "Default" and the whole frontside will have messages like the header.
Is that so that Joomshopping tree modul for Joomla 3 is the same as Joomla 2,5?

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Aw: Strict Standards: Non-static method jshoppingTreeCategoriesHelper::getTreeCategory() should not be called statically

module Version?

Aw: Strict Standards: Non-static method jshoppingTreeCategoriesHelper::getTreeCategory() should not be called statically

mod_jshopping_tree_categories_3.3.6
I downloaded version 3.4.0 and changed configuration to "default" and it works
Thank You!

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