Is there something wrong with the way I'm using the ./?

So I'm trying to install the crimson driver on ubuntu. I have done it before without issue. Whatever the reason now I cd into the directory that has the installer and type

sudo ./amd-driver-installer-15.302-x86.x86_64.run

and it tells me

sudo: ./amd-driver-installer-15.302-x86.x86_64.run: command not found

and without sudo it tells me

bash: ./amd-driver-installer-15.302-x86.x86_64.run: Permission denied

and apparently I put the administrator password in wrong twice during install because I can't get it to tell me anything other than Authentication failure.

le sigh.

so it is already resolved?

if not, did you chmod +x amd-driver-installer-15.302-x86.x86_64.run ?

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Thank you sir, as usual, I am a dingus.