Post title error

I’m moving my blog to another host, I exported my database succesfully but all the titles of my posts show an error before the title itself. The error it shows is:

“Error – wrong setting for filetype.Error: The Folder [a] is not writeable.itle-of-the-post”

yeah, it shows the title but whithout the first letter of it. weird.

In edditing mode the title shows up correctly, so it does in the DataBase.

Any advice? Thanks in advance!

PS: you can see it for yourself here: https://www.gran-angular.net