Add a section on troubleshooting [skip ci] (#5788)
Add a section on troubleshooting [skip ci] (#5788)

* Add a section on troubleshooting [skip ci]

* Move troubleshooting section to be under the running tests section

* [skip ci]

chicoxyzzy/babel,kedromelon/babel,shuhei/babel,samwgoldman/babel,guybedford/babel,hulkish/babel,kellyselden/babel,maurobringolf/babel,existentialism/babel,hzoo/babel,maurobringolf/babel,Skillupco/babel,chicoxyzzy/babel,hzoo/babel,kellyselden/babel,babel/babel,guybedford/babel,chicoxyzzy/babel,Skillupco/babel,samwgoldman/babel,PolymerLabs/babel,guybedford/babel,claudiopro/babel,shuhei/babel,existentialism/babel,jridgewell/babel,chicoxyzzy/babel,kaicataldo/babel,existentialism/babel,hulkish/babel,claudiopro/babel,babel/babel,babel/babel,hzoo/babel,kedromelon/babel,maurobringolf/babel,babel/babel,kaicataldo/babel,vadzim/babel,jridgewell/babel,kedromelon/babel,Skillupco/babel,claudiopro/babel,jridgewell/babel,Skillupco/babel,PolymerLabs/babel,hulkish/babel,samwgoldman/babel,kellyselden/babel,hulkish/babel,jridgewell/babel,kaicataldo/babel,kellyselden/babel,shuhei/babel,vadzim/babel,hzoo/babel,PolymerLabs/babel,kaicataldo/babel