Backoffice product file does not show created combinations

[pacoroige]

Hello ! I have the following problem and after trying several things I don't know what to do

In the backoffice product card, when choosing the "combinations" tab, the list of combinations created is not displayed, despite the fact that it shows the message "0 of 2" (2 are the combinations created). The wheel-shaped cursor stays rolling, and from there it doesn't move. If I try to save or go back to the product list, I get the message “cannot update settings”

The last time I modified any product, everything worked correctly.

I have tried to disable the last module installed (ets SEO audit) and everything is the same.

My Prestashop is 1.7.4.4 - the php version is 7.2

The front of the store (funatic.es) seems to work correctly.

Thank you very much in advance

[pacoroige]

When activating the "debugging" mode when going to the page of any product in the front-office, the error messages and the indications shown in the attached file appear

error pagina producto.pdf