I was able to use avatars today, I tried using avatars from my gallery and apparently nothing worked. All the images I have are too large. It turns out that there are special requirements for avatars "120px wide, 80px high, and 100 KiB size". Can this be done automatically? So that images can be automatically resized after uploading?
If you are using mobile phone then you can use a apps name
Picsart you can find it on playstore and also appstore and resize a picture through this apps. I sometimes cut a picture to 120px by 80px using this app. But its picture quality is a bit low but it is acceptable. And if you somehow can't get an avatar weight below or equal to 100kb then you can use a ninja technique like I do. Send that picture to someone on Facebook Messenger and then download it again and you will see that the weight has completely decreased. or if you use pc or laptop then Photoshop can easily help you for this issue