Describe the problem:
INVALID API KEY
Which exchange/wallet is this regarding?
Cronos
How did you import data into this wallet?
ApI ,MM addresd
What have you tried to fix this so far? resync several times ,worked perfectly up till today
Heyo @vandazum !
Can you please send your wallet address along with your Koinly email over to support@koinly.io ? Thanks for bringing this up 
Have a great week ahead.