Oh. I thought this was a Python library issues and had nothing to do with LE. I too have had two occasions where I couldn't get certs with MIAB after upgrading.

Oh. I thought this was a Python library issues and had nothing to do with LE. I too have had two occasions where I couldn't get certs with MIAB after upgrading. The first was some weird library that was missing after upgrading from like 10 versions behind on MIAB. IIRC it was a core Python library that had changed. The other was something that had to do with there being multiple "instances" of certificate chains. Basically all it made me do is make sure I was monitoring the administrator@ account for the primary MIAB domain to make sure I'm updating it regularly. Also I think MIAB is one of the few pieces of software that can safely be upgraded regularly without pain. I really trust Dr. Tauberer's project.