Some unsafe characters will break the payload. Try with the browser, or encode it with proper
I tried via the precious.htb page (skipped burp) and I tried encoding it but nothingā¦ Itās kind of annoying
Just completed my second machine, this one was much easier because I already knew the first steps, and the script I made for Photobomb helped me a lot to enumerate everything in the beggining
I forgot to say in the other post, but I didnāt use Burp, in neither one of the machines
If anyone is desiring to have some help, you surely can send me a message, R is always here 
Root is killinā me.
/usr/lib/ruby/2.7.0/psych.rb:456:in `parseā: (): mapping values are not allowed in this context at line 3 column 7 (Psych::SyntaxError)