Error 0300-8006 154318 bambu studio

Why is my bambu X1C all of a sudden coming up with this messgae whenever i send a print to the printer??? it says "The build plate marker was not detected (error 0300-8006 154318). I have a second party textured PEI plate that i have been using for the past 2-3 years without a problem, but it all of a sudden is now stopping the print and popping this message up. to continue the print I can select “resume” but I want it solved as it means I have to wait for the message to pop up and then hit resume before the job prints.

Anyone else having this issue?

Been printing ABS or ASA? You might need to clean the camera lens.