Errors began after updating to Angular-Cli V10.1.0. Initial problems I encountered: The ng command was not working. I found that core dependencies were missing:
ios-frameworks
bexio
zkemkeeper
realm-functions
naos-project
pyfakefs
pointer-to-array
easing
rdlc
policy
system.text.json
text-chunking
oop
spreadsheet
yarnpkg-v3
lisp-macros
logos
vonage
optimal
couchdb-3.x
tinydb
doi
.net-4.5
jms-topic
nested-if
aginity
analysis
apollo-testing
react-children
cdo-emf