Error: invalid credentials (Failure)

Operating system

Windows

Joplin version

3.6.14

Desktop version info

joplin 3.6.14

Sync target

Joplin Server

Editor

Markdown Editor

What issue do you have?

When the application start an error message appears: "Error: invalid credentials (Failure)".
It’s not a big deal because Joplin starts up as normal and runs without any issues.
What could be causing this error?
I haven’t found any references to this error; only messages about invalid cloud credentials.
Thanks in advance for any suggestions.
Tony

Screenshots