I'm trying to apply but the portal was not working

Okay, you should try to revisit the site later in the day as there may be internet or site issues. Alternatively, here is a few other options you could try.
Contact the nearest recruitment centre/ Army career centre. You can do this via phone call or visit in person. They can assist with your application and provide information on how to proceed in the progress. Information for numbers and sites are on the army job website.
I imagine if you’re having issues though online, they will fix the issue pretty fast so keep checking back but most importantly look for a solution, and don’t give up.

Probably I'm applying from Africa,