Merchant stopped working all of a sudden.

Is this a bug? it was working just fine 30 to 45min ago.

every single item in my inventory is grayed out, even items that were inside the merchant tab if i take it out becames grayed out like the others, i can't add anything to it.

i tried login out to see if helps but it didn't.

i also tried taking one item from there to see if i could put it back, but no.

Hundreds of bug reports this league. It only affects one tab at a time and typically fixes itself after 5-10 minutes (may or may not require leaving and rejoining after the timer is over to start working).

Some isolated cases it doesn't fix.. in which case my best suggestion is to remove everything in the tab, wait at least 10 minutes, restart game again, select a new hideout, go back to original hideout, and check again. That pretty much rules out everything we can do as a player to fix it.