cant convert map to uefn

Hello, i dont know why i cant open my map which i build in creative in uefn. Everytime i try to convert it uefn freeze and i need to close uefn with the task manager. Please help

@septerik88 Thank you for your report! Can you please re-post using the “New Issue” option on the Issues and Bug Reporting forums? Posts with this feature are connected directly into our development team so we can quickly get to them!

For more information, such as how to get the reference ID, please check out the article here: Using the Creative and UEFN Bug Reporting Form

i have the same problem and dont not how to fix it

i think i have a solution. dont do it in full screen mode. maybe it works.