The wooden chests are set to be able to join up to 42 pieces by enabling the joining of wooden chests.
Using this blueprint, when I try to join a range, it fails with an error.

The error does not occur if the arithmetic circuit in the facility is turned off.

Factorio 2.0.10
MOD 6.0.1

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Can reproduce, caused by not tested circuit connection to combinators. Working on fix.

In the meanwhile workaround is simple...don't merge chests connected to combinators.

Fixed in 6.0.2

Fixed in 6.0.2

Thanks for the correction.
6.0.2, great!