This is mostly the issue with core and contrib 'migrate' related modules that use the Logger API wrong. The problem happens when you have cron job with migration.
But until it is fixed in core, here is a patch as quick fix.

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#2 invalid_argument_exception-2892639.patch436 bytesundertext

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undertext created an issue. See original summary.

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undertext CreditAttribution: undertext as a volunteer commented
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new invalid_argument_exception-2892639.patch436 bytes
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berdir
Primary language German
Location Switzerland
CreditAttribution: berdir at MD Systems GmbH commented
Status: Active » Fixed

Makes sense, thanks.

  • Berdir committed a3e4b5a on 8.x-2.x authored by undertext 
    Issue #2892639 by undertext: InvalidArgumentException: $string ("some...

Status: Fixed » Closed (fixed)

Automatically closed - issue fixed for 2 weeks with no activity.