404 status for stylesheet

[Luxamman]

Hello,

while working on speeding a website up, I was seeing a problem in the waterfall view of Chrome a.s.o.:

404 - Stylesheet not found.
/wp-content/plugins/elementor-caldera-forms/assets/css/elementor-caldera-forms.css?ver=5.1

This is giving a waiting time of 200 - 800 ms for each pageload.
Can you reproduce it?

Thanks!

== Server Environment ==
Operating System: Linux
Software: Apache/2.4.35
MySQL version: Source distribution v5.6.19-67.0
PHP Version: 7.2.11
PHP Max Input Vars: 1000
PHP Max Post Size: 8M
GD Installed: Yes
ZIP Installed: Yes
Write Permissions: All right
Elementor Library: Connected

== WordPress Environment ==
Version: 5.1
WP Multisite: No
Max Upload Size: 8 MB
Memory limit: 192M
Permalink Structure: /%category%/%postname%/
Language: de-DE
Timezone: Europe/Vienna
Debug Mode: Inactive

== Theme ==
Name: Astra
Version: 1.6.9
Author: Brainstorm Force
Child Theme: No

[mikeys4u]

I have had this in many of my websites, so I stopped using Caldera forms!
wp-content/plugins/elementor-caldera-forms/assets/css/elementor-caldera-forms.css?ver=4.9.10
It shows in all SEO tools as 404 error.
As I still need to fix this properly, can you help?
Could create an empty file at that location, or redirect it but need to know what it actually is looking for?
(Can't provide actual website sorry)