Anyone know how to fix this

for my dahua products, normally unplugging or powering off-an-on again, will reset the unit back to unlock. Which brand you are using?
 
used long time ago, but basically it will allow you to edit some network parameters (your hik product), regarding resetting password, changing ip, and configure in general. After downloading the program, a pdf is included with instructions
 
you may also check the firmware installed (listed as firmware version on the tool) at all cameras. Sometimes updating the firmware could help.
 
There are many hik experts in this forum that will help you for sure. Good luck and stay safe!