Invalid color: [× Invalid color: [×

[P1119r1m]

Jenkins and plugins versions report

Environment

Jenkins: 2.387.1
OS: Linux - 5.4.0-135-generic
Java: 11.0.18 - Eclipse Adoptium (OpenJDK 64-Bit Server VM)
---
...
docker-commons:419.v8e3cd84ef49c
docker-java-api:3.2.13-68.va_875df25a_b_45
docker-swarm:1.11
...

What Operating System are you using (both controller, and any agents involved in the problem)?

Linux

Reproduction steps

May be reproduced in Firefox and Edge Web browsers.

Expected Results

When visiting:

• http://127.0.0.1/jenkins/swarm-dashboard/

instead of displaying circular plots for each node (in "Nodes" section), following RED messages (or buttons) are printed:
Invalid color: [× Invalid color: [×

Actual Results

We expect to see circular plots instead of strange RED text/buttons.

Anything else?

This is a first time we faced this display problem.
Previously, it worked like a charm.

Thanks to developers!