Some other times it looks okay in the editing process, but after rendering to video, it shows lost psd file layer. The problem can be solved sometimes by just garther the media, but sometimes not.

I suspect that because I use Affinity Photo 2 to save it as PSD, because I don't use photoshop to design characters or scene. There is nothing wrong with my PSD files. I already checked. They are there, and I did not change anything to the files. I just reopen Moho project and it becomes errors like this.
What I did to solve this problem:
1- Close all the application that lunched while using Moho such as Affinity Photo and Davinci Resolve.
2- Restart my pc.
3- Gather media (sometimes works, sometimes the problem still exists) until I do number 1 and number 2.