Brake help please

A VERY common cause of this is mismatched parts at the master cylinder, causing the master piston to "not return" fully. This does not uncover the ports in the top of the bores of the master, causing pressure to be held

A quick way is to pump up the brakes, and with one wheel jacked up, if it is obviously dragging, take a rag/ container, and crack the nuts at the master........see if there is fluid released, and if the tire then frees up