fatal: unable to access();

hi guys am haaving issuse with my git accout it keeps telling me fatal: unable to access (): SSL certificate problem: self signed certificate in certificate chain

That smells like someone is messing with your traffic. What exactly are you trying to do?

i get this error git push
Username for ‘https://github.com’: vladut123
Password for ‘https://vladut123@github.com’:
remote: Permission to RMerl/asuswrt-merlin.ng.git denied to vladut123.
fatal: unable to access ‘https://github.com/RMerl/asuswrt-merlin.ng.git/’: The requested URL returned error: 403

You’re trying to push to a repository that belongs to someone else. Are you sure you have write access to this repository?