@tutrix update. Now the signature is displayed. Most probably it is found in the forum cache oppure the minimum number of posts written.

ah ok! yes could be the theme

@tutrix yes it's a profile I created with signature

Hi! a line comes out but the signature does not come out. I checked it seems that the signature is enabled and visible. Thank you!  Screenshot-...

another thing how is it possible to set the avatars like in this forum that always change?. Thanks for your support.