Missing skinview3d when player has default skin

[nstringham]

Description:

when a player has the default Steve or Alex skin a blank space is displayed where the skin should be.

Steps to reproduce:

1. open profile of a player with a default skin for example:
   a. Aiden_p123
   b. wastesometime
2. obsere that the skinview3d canvas has nothing drawn
   

Console logs

Chrome:

steve.png:1 Failed to load resource: the server responded with a status of 404 ()
wastesometime:1 Failed to load resource: the server responded with a status of 404 ()
viewer.ts:78 Failed loading https://sky.lea.moe/texture/steve.png
skinImg.onerror @ viewer.ts:78
viewer.ts:91 Failed loading https://sky.lea.moe/cape/wastesometime
capeImg.onerror @ viewer.ts:91
content.js:1 {"type":"get_background_image","requestDate":"2020-09-24T05:42:28.798Z"}
DevTools failed to load SourceMap: Could not load content for https://unpkg.com/tippy-bundle.iife.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE
DevTools failed to load SourceMap: Could not load content for https://unpkg.com/popper.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE

Firefox:

Failed loading https://sky.lea.moe/texture/steve.png viewer.ts:78:45
Failed loading https://sky.lea.moe/cape/wastesometime viewer.ts:91:45

Browser Versions

Chrome Version 85.0.4183.121 (Official Build) (64-bit)
Firefox Version 80.0.1 Build ID 20200831163820