Chipmakers also fell after U.S. peer Nvidia NVDA.O forecast current-quarter sales below analysts' expectations. By Susan Mathew May 26 (Reuters) - European markets were modestly higher on Thursday, bolstered by energy shares and the U.S. Federal Reserve sticking to script about monetary tightening, with sentiment fragile on lingering worries about slowing economic growth. "Investors appear to have taken some comfort from the fact that the (Fed) minutes did not lay out an even more aggressive path of monetary tightening despite (inflation) remaining at elevated levels," said Stuart Cole, head macro economist at Equiti Capital.