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:
interactive-grid
fusedlocationproviderclient
dropdownbox
non-printable
e4x
assimp
ssms-addin
python-holidays
third-normal-form
wildfly-10
mips64
minimize
uca
android-include
presentation
fastcgi
qdockwidget
omdbapi
gtid
fail-fast
herepy
list-initialization
executenonquery
wasmtime
icmp
qweb
executionengineexception
information-gain
hosting
fabricjs