today I have had to rebuild the entire website, I used joomla! version 3.8 for this.
Unfortunately uddeim v4.0 does not install with this joomla version. I am getting an error (using the file uddeIM_4.0_j30_unzip1st.zip):
Warnung
JInstaller: :Install: Die XML-Installationsdatei konnte nicht gefunden werden.
Fehler
Es kann kein Installationspaket gefunden werden!
Hope you are already aware of this issue. What do you advise me to do?