How do I upload a picture to the forums

[LP7K]

How do I upload a picture on the forums without having to upload it to a third party website, Also when I try to upload a custom picture from my pc for my signature : https://prnt.sc/pcndwu
this shows up https://prnt.sc/pcncfj
but I need this https://prnt.sc/pcncsn

 

[Daigestive]

n

 

[rogue]

the image box is broken the only way you can insert it is the [ img] bbcode command