brush tool not appearing on preview?

[#1]

haven't touched animate in a while after transferring to a different laptop, and when i use the brush tool on the canvas it doesn't seem to appear on preview. however, when i select wherever i assume i put the brush strokes, it shows the part that were selected (as seen below in the screenshot).

not sure if this is to do with my tablet, as it seems to work fine in other art programs such as medibang paint or firealpaca, and im not sure if it is just animate not working properly. please help

[#2]

haven't touched animate in a while after transferring to a different laptop, and when i use the brush tool on the canvas it doesn't seem to appear on preview. however, when i select wherever i assume i put the brush strokes, it shows the part that were selected (as seen below in the screenshot).

not sure if this is to do with my tablet, as it seems to work fine in other art programs such as medibang paint or firealpaca, and im not sure if it is just animate not working properly. please help