Unable to Attack with Left Mouse Button BUG in New World October 15, 2021 by Let Me Fix It Facebook Twitter Pinterest LinkedIn Amazon New World comes with some annoying bugs (like this LMB bug), this is how you fix it (with a workaround) until Amazon addresses this issue. If you can’t attack with the LMB, this video will show you how to fix it. source
Didn't work for me. Just got this bug. :/