Bug ID 1756897: [APM][PA]Failed to execute 'observe' on 'MutationObserver': parameter 1 is not of type 'Node'

Last Modified: Jun 19, 2025

Affected Product(s):
BIG-IP APM(all modules)

Known Affected Versions:
17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4, 17.1.2, 17.1.2.1, 17.1.2.2

Opened: Nov 29, 2024

Severity: 3-Major

Symptoms

Application fails to load with below console error in developer tools. Uncaught TypeError: Failed to execute 'observe' on 'MutationObserver': parameter 1 is not of type 'Node'.

Impact

Unable to load application via portal access.

Conditions

Portal Access configured.

Workaround

Customized cache-fm-Modern.js ifile workaround is available for this.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips