IPTV on Nebula Capsule Max

Hy there!

First of all: sorry about my english, but its not my motherlanguage…

I bought The Nebula Capsule Max and want to watch my IPTV-list on it. So i startet the IPTV-Player on Nebula and filled the necessary things in the siptv-website. When i open the app on Nebula, theres like the “in-process-waiting-circle”, but at the end, the message is shown, that the app will close… So, do you have any suggestions, what i could change or try? Is there a limit about the Playlist/stations?

Thanks for your suggestions!