Hello everybody
I just installed the V13 PRO
Tried to import my website from V12 PRO
Received error messge 
Then I tried this:
opened the website in V12 Pro and did CTRL > Preview
After opening the preview, I exported the website again as a project
Tried to import it once more, but received the same error message, see attachment
Please help.
If I cannot import my website into V13, I really cannot use the new version.
Thanks for helping