Disappearance of the main inventory bar in all my worlds.

I was playing together with a friend in a world of his. I decided to enter a world of mine with him in which my main inventory bar did not appear, it did not seem so important to me because it did not happen to him so I thought that this was a bug in the world so we both left and entered another and this continued. I quickly went into another and another... to realize that what started as an inconvenience ended up expanding to all my worlds. Fearing that a virus had infiltrated my Minecraft, I deleted all my worlds and restarted my PC. Create a new world and there it was.