You may have tried to use Softaculous app installer to get wordpress , and wp-admin is not working , one of solutions is to manually install wordpress :

And we gonna do it in 3 easy steps :

1. Upload WordPress : 
   
   Get it from the official website here and download it to your PC :
   
   Now go to File Manager, inside public_html you either : 
   
          • Upload directly [ in case you want wordpress in www.yourwebsite.domain ]
   
          • Create a folder [ in case you want wordpress in www.yourwebsite.domain/FolderName ] 
   
   
2. Create a database :
   
   Head to your cPanel and search for MySQL Databases :
   
   
   
   Type in your Database name  : 
   
   
   
   Create a New User :
   
   
   
   Add this User to the Database :
   
   
   
   And that's it !!
   
   
3. Install WordPress :
   
   Now we arrive at the last part of the tutorial : 
   
   Extract the zip you uploaded on step1 and you'll see a folder like this : 
   
   
   
   Now run the WordPress installation script by accessing the URL in a web browser. This should be the URL where you uploaded the WordPress files :
   
         • If you installed WordPress in the root directory, you should visit: www.yourwebsite.domain 
   
         • If you installed WordPress in its own subdirectory called FolderName, for example, you should visit: www.yourwebsite.domain/FolderName
   
   When it comes to DB info you refer to what you made in Step 2.
   
   
   And that's it, just follow the steps and your WordPress website should be on!