Total layer not displaed

Don't really understand this "form" so pls. have some understanding if I have misunderstand etc. I even don't know if I am on the right place to ask here.

What is the problem?

Total layer not displayed anywhere in Octoprint just a dash ( - )

What did you already try to solve it?

Totally new to all this so just tried FAQ's etc.
connection_state_dump_1

[octoprint.log|attachment]

Have you tried running in safe mode?

no

Did running in safe mode solve the problem?

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Complete Logs

(upload://ypYUX1SEhugkQEVJ20dhiKeSbJ4.log) (119.9 KB)
octoprint.log (119.9 KB)
octoprint.log, serial.log or output on terminal tab at a minimum, browser error console if UI issue ... no logs, no support! Not log excerpts, complete logs.)

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Additional information about your setup

Octoprint Version 1.5.3
running on Dell Laptop and:
Ubuntu 20.04.2 LTS|
|Release:|20.04|
|Codename:|focal|

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