When using a monitor setup where both monitors have a large gap in resolution sizes and using UI scaling on Windows 10, the save dialogues that appear in the engine can appear offscreen in certain scenarios. This involves the main editor being on the Primary monitor and an asset editor of some sort being on the secondary monitor. Depending how much UI scaling is being used on the Primary monitor, this can appear offcenter or completely offscreen, making it inaccessible.
This also occurred in 4.12 and 4.13
Head over to the existing Questions & Answers thread and let us know what's up.