It is difficult to tell you what is wrong with your project, without seeing your project.
Most likely extreme camera settings or large image file sizes or something else discussed in this thread:
TIPS to avoid crashes, freezes, failure to render or erratic behavior (2015)
You can save your project to the cloud folder and raise a support ticket if you would like customer support to look at it during UK business hours.
-Mike (videoscribe user)
Hi everything was going well, I was able to export file after embeding audio, i finished doing the timing corrections and now it wont render... no preview only it shows rendering your file and no progress. After a long waiting, I simply pressed x to quit and stop rendering, and the 'Cancel render button just continues to show ''VideoScribe (Not responding). What is the workaroiund for this please help as I only have hours to deliver this! Scribe'll let me down!