Importa and save article

[Paride Fontana]

Hi,

I've Magento 2.3.2 and I find two problems:

 - First is on import from a file: if I try to upload a file for update some products I've that error: 

Maximum error count has been reached or system error is occurred!; but I don't have any error on log.

 - Second is when I save an items, system work for several minutes and then return a 404 error; I've that problem only with product part; if I try to save a configuration or other edit every works fine.

Do you know the solution for this?

Thanks
Matteo