Thank you for the description. I assume they're using a bot management script which is set to block requests if devtools is open. For such websites, opening devtools in a separate window should work.
Some websites will try to throw you into a loop of debugger statements if they detect devtools being opened, which is harder to work around, but it doesn't seem to be the case here.
Some websites will try to throw you into a loop of debugger statements if they detect devtools being opened, which is harder to work around, but it doesn't seem to be the case here.