3 problems when trying to link an activity and a product

Hello
I’m using ProjeQtOr V11.1.3 (350)
I have 3  problems when trying to link an activity and a product (works fine when trying to link a project and a product)
1 : drag down procuct list is empty
2 : when assessing the product it is not possible to filter using the fild 'nom'
3 : the biggest probleme : since I upgraded to ProjeQtOr V11.1.3 (350) when a product is selected, it is displayed in the activity, but if I save the activity the product disappear

see screen copy in the attached pdf file

regards
 

I just checked and there are no error in the log file

OK; I understand : I didn't had any version for my products, since I have no use for versions in my context and it used to work fine before the new version.
I defined a version, a dummy version, the same for all product and now it works

thanks