Following this example is not necessarily required but should give you an idea of how to post a bug:

[FORUM TOPIC TITLE] Short description of your issue.

[ISSUE]

Describe your issue in full here. (I can't jump when pressing X on the controller / etc)

You can add images or a video showcasing the issue to the post as well. (if the issue is visible and can be showcased that is)

[GAME VERSION]

If possible put your game version number here, you can see the game version on the Main Menu Logo.

[OS]

Describe your OS here. (windows 10 / Linux / etc)

[COMPUTER SPECS]

If possible put information about your computer here such as Model (Lenovo ideapad 1i for example) or CPU / GPU / RAM / anything else that could be relevant.

[ADDITIONAL INFO]

If there is any other information that could be helpful then put it here. (maybe if you use some special keyboard or mouse or controller or something)