This is probably a good thread to post in the iManager forum specifically
as it is an iManager issue.

Since SLES 15 probably came out around the same time as iManager 3.1, if
not after it, this is likely something that will be supported soon but is
not yet because it could not have been tested fully due to the close
release dates. I believe iManager 3.1 was released around 2018-02, but
SLES 15 was not released until mid-year.

Good luck.

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