I am new to the Indi ecosystem

I was able to get out under a clear sky last night for the first time but couldn’t get polar alignment to work

I set up; connected all equipment; turned on tracking; too a phot ( Canon DSLR) and plate solved successfully;

However when I then attempted to use the polar alignment routine,- with all settings the same- it failed to plate solve even the first image and eventually aborted

Any suggestions would be gratefully accepted, thanks in advance