Can not Assigne value from Custom Attribute

[tonysargma79f8]

Hello.

Using magento 2.4.7 , clean install no modification .

Trying to create a configurable product, I have created custom Attribute ( Size ) , assigned to Attribute Set. In Admin , product Edit page, I can select value for the product , but when i save the page , that value disappears . I tried any combination but i can not set value and not persisting when saved. 

Any information would be appreciate .

[tonysargma79f8]

always find the solution after asking here. problem seems to be with file ownership.

I use two user account for file and folder permission , for some reason , which i have to ask Linux user, as to why my file and folder permission keeps changing to www-data ..

I have followed the setup from magento doc .. and I have added user to www-data . in this case i should be able clear cache and or flush cache , which seems it fails without error .

Thanks.