What this error means?

[tony]

Error: Cannot load new trade data: Data temporarily unavailable
    at update (C:\xampp\htdocs\js\node_modules\steam-tradeoffer-manager\lib\classes\TradeOffer.js:677:14)
    at manager.getOffer (C:\xampp\htdocs\js\node_modules\steam-tradeoffer-manager\lib\classes\TradeOffer.js:697:4)
    at _apiCall (C:\xampp\htdocs\js\node_modules\steam-tradeoffer-manager\lib\classes\TradeOffer.js:49:4)
    at SteamCommunity._community.httpRequest (C:\xampp\htdocs\js\node_modules\steam-tradeoffer-manager\lib\webapi.js:54:3)
    at Request._callback (C:\xampp\htdocs\js\node_modules\steamcommunity\components\http.js:67:15)
    at Request.self.callback (C:\xampp\htdocs\js\node_modules\request\request.js:186:22)
    at emitTwo (events.js:106:13)
    at Request.emit (events.js:191:7)
    at Request.<anonymous> (C:\xampp\htdocs\js\node_modules\request\request.js:1081:10)
    at emitOne (events.js:96:13)

Can you tell me why this error comes and what it mean?

 

or this

{ Error: There was an error sending your trade offer.  Please try again later. (26)
    at Object.exports.makeAnError (C:\xampp\htdocs\js\node_modules\steam-tradeoffer-manager\lib\helpers.js:10:12)
    at SteamCommunity.manager._community.httpRequestPost (C:\xampp\htdocs\js\node_modules\steam-tradeoffer-manager\lib\classes\TradeOffer.js:507:12)
    at Request._callback (C:\xampp\htdocs\js\node_modules\steamcommunity\components\http.js:67:15)
    at Request.self.callback (C:\xampp\htdocs\js\node_modules\request\request.js:186:22)
    at emitTwo (events.js:106:13)
    at Request.emit (events.js:191:7)
    at Request.<anonymous> (C:\xampp\htdocs\js\node_modules\request\request.js:1081:10)
    at emitOne (events.js:96:13)
    at Request.emit (events.js:188:7)
    at IncomingMessage.<anonymous> (C:\xampp\htdocs\js\node_modules\request\request.js:1001:12) eresult: 26 }

Edited January 15, 2017 by tony

[Dr. McKay]

The first error means that the data is temporarily unavailable, and you should try again. It's Steam's fault.

 

The second error: https://steamerrors.com/26