need help for new user

Hey guys! So I have finally got the access and have been added as valid user for our back-end admin page. I'm trying to install or add dark mode plugin but whenever I'm visiting the page, it says that I don't have permission to download. What's wrong here? ? C

I am non technical person. I am looking for someone who can help me to set up my logo. Please PM me with price.

hello, im new on xenforo, there is some dev can help with upload theme and addon? and customization my new forum? maybe i need some tips and help for setting my new forum. please post your contact and your price/h we can use skype or my livechat i have on my ecommerce. Thanks