The fix for the general AMGBackend in commit 21c2b3d8 didn't reach the El2PAMGBackend, since the el2p model defines its own AmgTraits. Resolve the issue by using template specialization and Dune::Capabilities.
The fix for the general AMGBackend in commit 21c2b3d8 didn't reach the El2PAMGBackend, since the el2p model defines its own AmgTraits. Resolve the issue by using template specialization and Dune::Capabilities.