This is regarding SharePoint 2019 environment.
I have created one dual authentication(windows/farms together) web application long back & it was working great.
Now I have created another dual authentication web application and applied your pack for 2016/2019 with a new membership database. Did configuration in the machine config & I can see my configuration is successful as I can create my new users and it’s going to separate new membership DB.
But the problem is about login, a new user in new web application and even old users in the old web application is giving the same error shown in the picture.
Any help will be appreciated.