How can I add credentials for a page which is not based on login / Password ?

@EricKvD

It appears 1Password is having some trouble identifying the the fields on the page. The only way to save both these fields is to create custom items for the site. If you're using 1Password for Linux, you can create a new item from the app and adding custom fields for the item to look like this:

If you don't have 1Password for Linux intalled, you can click the 1Password icon in your browser toolbar and choose New Item followed by Login. This will open a new tab in your browser on 1password.com. From here you can manually create an item with custom fields, like this:

Once you have the item saved, you will be able to autofill both fields by clicking the 1Password icon in your browser toolbar and choosing Autofill from there. Let me know if that works for you!