I just got a OnePlus 11 and installed 6.8. Very happy with everything except that I cannot even open OpenEUICC (v1.4.0-iode.1) as it crashes immediately. I was previously running 6.8 on a Pixel 6 Pro and it worked just fine, with no issues. Does anyone have any suggestions or advice on how to fix this, or is there a newer version being worked on?
Thanks so much 
As it is a new install and you don’t have anything to lose can you try and clear “Storage & cache” from “App info”? But also as it is a new install, I don’t know why that would solve anything 
but maybe?
Hi Rik!
Thanks for the reply and suggestion.
Since it was a fresh install (relatively) I opted to do a factory reset. After doing this I downloaded the OpenEUICC app from the iode OS channel on f-droid (as it was not a default install , as the first time I installed iode OS) and the same behaviour is still happening.
I notice you are an iodé team member and I was wondering if you have any way to contact the developer directly to see if they have any answers or solutions?
Euicc support for OP11 has been recently removed in LineageOS : sm8550-common: Remove eUICC support · LineageOS/android_device_oneplus_sm8550-common@ebc167b · GitHub
Thanks so much for the information! This explains it all. Really appreciate your reply 
FWIW, I also get immediate crashes from OpenEUICC 1.4.0-iode.1 on a OnePlus 9 Pro.
I don’t know if it has Euicc support builtin or not on the LineageOS side, but some other eSIM apps that I believe are derived from OpenEUICC (e.g. JMP SIM Manager) don’t crash and work at least to the point that my device passes the compatibility check when both SIM slots are populated with regular SIM cards. But I haven’t yet had a chance to try it with an actual physical eSIM card.