getting message "invalid inventory slot"

[xlayve]

so i just got message "account has invalid inventory slots. You won't be able to buy slots or claim crafted weapons(if you currently own no slots) for certain categories. Please contact support at https://digitalextremes.zendesk.com" 
but when i try to sell weapon or buy weapon slot it work normally, so what that's message mean ?

[(PSN)haphazardlynamed]

It means contact Support

 

my guess? sounds like ?somehow? perhaps a glitch? you've managed to Obtain more items than slots exist for them

doesn't have to be a weapon, lots of things have different slots. could be a warframe, companion, vehicle, riven, loadout, etc type of slot

apparently you're over limit on one of those categories

[xlayve]

is it posibble this things happen cz of my wf slot cz i just got excalibur umbra ?

[xlayve]

is it posibble this things happen cz of my wf slot cz i just got excalibur umbra ?

{solved) its bcz of excalibur umbra i just got.. looks like i dont have wf slot so my wf is more than the open slot

[Soy77]

Umbra comes with its own free slot. Just sayin.

[xlayve]

yea i read on google that umbra didnt take any slot cz it a quest item but in my case i think it cz of umbra, bcz when i buy 2 open slot, 1 slot is gone and the message stop appear. so thats make me sure the reason is umbra.