I have custom icons that work fine on IOS and Android. When I deploy on the Web, a crossed out box appears in each place in the App where my icon should appear.
ipython-magic
nanohttpd
python-appium
fcoalesce
maven-indexer
phpstorm
turbo-pascal
dokuwiki
sparql-generate
playsound
step-into
idea-gradle-plugin
template-tal
microsoft-speech-platform
figlet
local
vote-up-buttons
appimage-builder
vertx-verticle
navmesh
spring-data-mongodb
newline
frames
value-objects
trimesh
splicer
amazon-elastic-transcoder
wavesplatform
geth
spannable