I can't build walls in Sims 4 anymore?

After some time I decided to play Sims 4 again. I play on an older LG laptop, that does not run smoothly, but it runs. My problem is that I can't build walls anymore in the build mode. I can pull walls & the 'money' goes off but the wall is not there. I have disabled all mods, restarted the game, but it does not change anything, I just can't build walls anymore. Does anyone know what it is & how I can solve the problem? Would be very grateful

Hm, if you say "after a long time," did you think about the keys end and pos 1?

With these buttons you can turn up and down the walls, say fade in and out. Did not read anything in your question, so the proposal.