[bad custom templat] Invalid argument supplied for foreach()

Hello

- have you checked the Joomla folder paths for tmp and logs are correct (Joomla global configuration)?
- are your items listed in backend items manager ?
- is your frontend category view empty or do it show items and gives warning ?

Please answer the above,
and then send me a PM with super admin login, and a link to the frontend category view that show the issue

Regards

- have you checked the Joomla folder paths for tmp and logs are correct (Joomla global configuration)?

Oui, ils sont corrects.

- are your items listed in backend items manager ?

Oui

- is your frontend category view empty or do it show items and gives warning ?

Excusez-moi, je viens de me rendre compte que la 2ème erreur s'affiche lorsque j'active le Débogage système de joomla, et la 1ère lorsque le debogage n'est pas activé.

Donc lorsque le debogage n'est pas activé, les items s'affichent et il y a une erreur au dessus de chaque item.

Cordialement.

Hello

-- inside your custom template code of category view code you had bad code:
(category_items_html5.php)
... but $this->item does not exist in category view you should use what ever you have in your item loop
e.g in your case: $item
(now you can see a NEW extra favoroutes icon has appeared, if you don't want it, then remove the above code from your template)

-- if you have other templates please update them

the error existed in previous server but it was not printed, due to error_reporting level set to none

Regards