Help me for mdb!!!

Hi everyone, I've tried "everything," but I just can't seem to get it working. I keep getting this log entry:
 

Job (MDB Version: 3.4.1) started at 07/06/2025 07:35:50

[Critical] 

Object reference not set to an instance of an object.

[Critical] 

   at  .–. ..ctor(String)

   at  .–. ()

   at  .–..ctor(String[])

   at  .—. (String[])

[Critical] Unhandled Exception

[Critical] Execution stopped

Here mine C:\Users\username\AppData\Local\WebGrab+Plus\mdb\mdb.config.xml (all *.ini files are present):

<?xml version="1.0"?>

<settings>

<site movies="imdb.com.imdb, imdb.com.ask" series="imdb.com.imdb_series"></site>

<filename>source_file</filename>

<ldbfilename update="f" add-nomatch="no" retry-nomatch="no">mdb.xml</ldbfilename>

<selectmovie>defaults</selectmovie>

<selectserie>defaults</selectserie>

<matchmovie>defaults</matchmovie>

<matchserie>defaults</matchserie>

<episodenum_pattern>"Season'S1'Episode'E1'""Season'S1'Episode'E1'/'Et1'"</episodenum_pattern>

<episodenum_pattern site="se.timefor.tv">"Season'S1'Episode'E1'""Season'S1'Episode'E1'/'Et1'"</episodenum_pattern>

<mdb-starrating subtract="4" multiply="2.5" max="5"></mdb-starrating>

</settings>

Here mine C:\Users\username\AppData\Local\WebGrab+Plus WebGrab++.config.xml:
 

<?xml version="1.0" encoding="utf-8"?>

<settings>

  <filename>\\DS220NAS\web\senderliste\guide.xml</filename>

  <mode></mode>

  <postprocess grab="y" run="y">mdb</postprocess>

  <user-agent>Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36 Edg/91.0.864.59</user-agent>

   <credentials user="your username for the site" password="your password for the site">site name</credentials>

  <decryptkey site="site-name">decrypt_userkey</decryptkey>

  <license wg-username="*****" registered-email="*******" password="******">To force a license update; replace this text with the letter f</license>

  <logging>on</logging>

  <retry time-out="10">4</retry>

  <timespan>0</timespan>

  <update>i</update>

        <channel update="i" site="magentatv.de" site_id="373##cf416cc96a575e40e35f43c05d829efdb176bc35.png" xmltv_id="Das Erste">Das Erste</channel>

</settings>

Maybe someone will be kind enough to shed some light on the tunnel for me, and I'll somehow get it to work. what am I doing wrong?
Thanks.