The Button “Save Imports” Stop Worked

Something strange happened inside my wordpress with all import plugin. 

An error occurred while using the All Import plugin which performs the imports, several failures occurred yesterday.

However, being able to resolve it, I noticed today that some issues did not occur as expected.

And when I went to open the plugin, it worked correctly, but the "Save Import Settings" button lost his action.

Then I did several tests.

I reverted to a previous version of the plugin.

I uninstalled and reinstalled.

I made a backup on the wordpress installation the date above.

The glitch persists, but going to another website and trying to use the same plugin with the same theme, the plugin worked.

Which could be some problem with my installation.
The plugin is working but the button isn't so I can't change or made any new import.

I also tried to remove the .htacess. and created a new one, no success at all, I even turned on the WP_DEBUG but there's nothing there about the All Import.

I did the safe mode with standard theme and all the plugins deactivated. Also don't worked, I did the unstall and erase tables orphans e files on database. 

Then when I try to install I get some erro on when it will start to create the import.  The page don't load.

I already open I ticket to support I'm waiting for an answer, but if any one could help me, maybe this could be more easy to fix  then what  I'm thinking.