problems after the update

It is difficult to say what caused the problem, but after switching to php 7.4 and updating allinone seo pack began to notice problems in different places. Initially, in the self-written plugin, the titlt and description substitution filter fell off:
Was
add_filter (‘aioseop_title’, ‘analysis_plugin_name’);
I had to replace
it with add_filter(‘the_title’ ‘ ‘ analysis_plugin_name’);
Roughly the same with keywords and description.

Further, the menu items in the theme template are missing, or rather they are not missing, but the link text itself has disappeared from the code
The problem could not be solved, temporarily prescribed a menu in the form of simple html.

Next, the Title of all articles disappeared, the h1 headers of all articles also disappeared, we managed to solve it by substituting <? php the_title ();?> on <? php echo ($post->post_title);? >

To be honest, I thought that all the problems from a crookedly written topic, and after changing php, I will just gradually correct the jambs. But later I accidentally noticed in the admin panel, in the records section, in the title field for all records it is written (without a name), and this is clearly not a problem with the topic. The author and categories fields are displayed normally. I suspect that this is not the only problem, and it is necessary to find out the reason. Tell me where and the problem.