I just started playing again after about a year of being inactive. Accepted the quest in Stormwind called ‘Tour the Trading Post’. The cache is inaccessible; thus I cannot claim my 500 tokens. Looked online for solutions - not helpful. Thanks.
do you own Dragonflight?
Oh! I thought I did… But apparently not. I’m assuming I need that to complete this quest?
Thank you!
yes.
they should have only made this quest available to people who own the expansion… but i guess it baits people into spending more money so they can access it. 
No joke - They got me! Now I’m in the predicament of either pre-purchasing The War Within Heroic Edition, which has Dragonflight + goodies for $70, or just Dragonflight by itself for $30. xD
Follow up -
Turns out I did not have to purchase Dragonflight afterall… I believe there was a pre-requisite: Once I completed the Human Heritage quest line (this is all on alliance btw), it opened up the cache and I was able to complete the Tour the Trading Post quest.