Can't insert new record on backend

I have a website with contao 3.0.5 + efg 2.0.1. In backend, when I try to insert a new record the following error occurs:
500 (Internal Server Error). The error_log says:

Code:

---

PHP Fatal error:  Class 'Efg\Exception' not found in ...system/modules/efg/classes/Formdata.php

---

Does anyone have the same problem?

Thanks

No, but I have had the same error for incompatible extensions. You can try and regenerate the autoload files. In the left bottom of the backend you can find the autoload creator. Be sure to check overwrite, but backup the original autoload.php file first.

Hi Ruud, I've tried regenerating the autoload files, but the error continues. One thing that I forgot to mention was that I've duplicated one form several times and the field names continues the same. This will cause a problem?

Thanks!