Werk #20118: Agent vSphere crashes with "'NoneType' object has no attribute 'reveal'"

Component	Checks & agents
Title	Agent vSphere crashes with "'NoneType' object has no attribute 'reveal'"
Date	Jun 19, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p8 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The special agent for vSphere would crash whenever the login expired.

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