Login 403 error only I’m getting

I’m having a very strange problem trying to log into a WordPress site and no idea why. It is only me, my web host can see zero issues their end, they can login fine. Friends I’ve sent the login info to, they can login fine. If I use lambdatest.com (remote browser) I can login fine.

It’s ONLY my end.
And the EXACT same site I can login without issues on my staging server, I have just migrated it across to the new hosting.

For me on the new hosting:
– I can view the front end as normal, add to cart …etc.
– I can view login screen.
– When I try to login, it reloads the “wp-login.php” URL, but displays a “403 forbidden” error message.
– I can go back to the front-end and browse again as normal.
– I have not been logged in.

What I have tried:
– Clearing browser cache, trying different browsers.
– Accessing via both my wifi/internet, as well as tethering on my phone.
– Accessing via a VPN (NodVPN)
– Changing my DNS to 1.1.1. 1 (advised by a friend to give it a go)

None of this has worked.
Does anyone have any other suggestions of what I could try?
It’s obviously not anything on the site, it’s something on my end, but what could it be???

• This topic was modified 3 years, 3 months ago by Jan Dembowski. Reason: Moved to Fixing WordPress, this is not an Everything else WordPress topic