We encountered a hardware failure this weekend and will gradually restore 2.0.x artifacts in our Maven repository (versions prior to 2.0.10 are already available).
However, branch 2.0 has reached its end of life, so upgrading to version 2.1.1 is certainly a good idea.
As far as I know, the SLF4J extension has not changed at all from 2.0, only log levels were installed and JULI software control was added. Maybe it broke something.
Could you introduce a problem on GitHub?
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