A downward guidance revision and an abrupt CEO change are making investors nervous.A disappointing first-quarter earnings report recently wreaked havoc on UiPath's (PATH 1.02%) share price. In a single trading session, shares of the robotic process-automation specialist tanked about 35%.Investors were responding to the abrupt dismissal of a CEO and a reduced outlook for the rest of its fiscal year.The road ahead for UiPath might not be as smooth as anticipated, but it looks like the market may be overreacti ...