Can’t type in transfer fee amount

This is difficult one to answer, it may be because the team is 4 and a half star and all teams which have offered money have been higher! (5star) I played as Totenham and they actually bought suarez, which was good for me! Another idea is to play as the team not just your player so (if your good) the players wont go out of form and wont be sold on! To prevent everything your best bet is probably manager mode!

it can both be a software or hardware issue. if it were a software issue it might have some problem with usb drivers, try re-installing those, also try to check if you are not using any software that is interfering with mouse usb ports or such.

if it was a hardware issue, i would recommend you switch your mouse and see if it works, also try to create a new test user for your operating system and see if it solves the problem.

last solution will be try switching the usb ports.