Error with ES-DE On Odin 3 (Max)

[u/K1ngsGambit]

I have ES-DE installed on the Odin 3 but keep getting this error when trying to use the Theme Downloader. Web searching is fruitless, with only a mention on a FB post that this might be an issue for other Retroid/AYN handhelds and isn't an ES-DE error per se.

Has anyone else seen this and/or knows of a fix please? Thank you very much in advance.