Looks like you are hi-jacked.

Try flashing firmware.

Then try a different password.

Like admin2admin.

Lastly get a cheap router.

And do this

Modem - old router- cheap 4 port switch- cheap router - switches to your miner- miners all with new passwords.

You need the router to be different address.

Old router 192.168.0.1-254
New router 192.168.1.1-254

I don’t know your old router if it is .0.1-254 or .1.1-254 or .10.1-254.

But the new router need to be different.

When you monitor the gear. You need to plug the pc in after the cheap router.

One last suggestion borrow a completely different laptop or pc you have not been using to check you mining with.

Don’t mine on NiceHash try Ckpool.org to viabtc.com.