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.
lego-mindstorms
idictionary
outputcache
listeners
ngx-codemirror
restartmanager
textwatcher
groupwise-maximum
rowcount
vin
appcelerator
critical-section
weka
oracle-cloud-functions
teamcity-rest-api
search-engine
beam-sql
httppostedfilebase
graphql-java
laratrust
uint8list
azure-integration-runtime
ccombobox
weatherstack
elasticsearch-client
chrome-web-driver
orc
wan
filter
sbt-assembly