EDIT : the problem with my endpoint was solved : I was building the endpoint jar with dependencies and dynamically loaded it to the table, and as the log says there are conflicting dependencies. Build without deps and everything goes fine.
As for the regions blocked in FAILED_OPEN state because of this .jar, can’t reassign them nor alter them. Sometimes I manage to enable them again, then drop them but I have no idea why. I’m open to any ideas