docs: update troubleshooting guide.
docs: update troubleshooting guide.

simudream/disco,oldmantaiter/disco,oldmantaiter/disco,oldmantaiter/disco,discoproject/disco,mozilla/disco,pombredanne/disco,ktkt2009/disco,discoproject/disco,pavlobaron/disco_playground,ErikDubbelboer/disco,mwilliams3/disco,mozilla/disco,oldmantaiter/disco,beni55/disco,seabirdzh/disco,ErikDubbelboer/disco,ErikDubbelboer/disco,beni55/disco,ErikDubbelboer/disco,seabirdzh/disco,ktkt2009/disco,pooya/disco,mwilliams3/disco,mwilliams3/disco,oldmantaiter/disco,scrapinghub/disco,seabirdzh/disco,ktkt2009/disco,pavlobaron/disco_playground,pavlobaron/disco_playground,scrapinghub/disco,discoproject/disco,pooya/disco,mwilliams3/disco,mozilla/disco,discoproject/disco,simudream/disco,ErikDubbelboer/disco,beni55/disco,mozilla/disco,simudream/disco,scrapinghub/disco,seabirdzh/disco,beni55/disco,pavlobaron/disco_playground,scrapinghub/disco,beni55/disco,pombredanne/disco,pombredanne/disco,simudream/disco,mwilliams3/disco,simudream/disco,pooya/disco,seabirdzh/disco,pooya/disco,ktkt2009/disco,ktkt2009/disco,pombredanne/disco,pombredanne/disco,discoproject/disco