Cannot Upload Images

1) Getting the following permission error when trying to upload image:

https://cdn.livechat-static.com/api/file/v2/lc/att-old/8801096/fd290fb55992ac8fc473e587cd06de31/Screen%20Shot%202019-02-21%20at%2011.30.46%20am.png

2) Have a low Page Speed Score, please advise what could be done to fix this.