Plantuml show broken icon in chrome

Hello,
I use plantuml in markdown text in gitlab wiki. In firefox everything looks good but in google chrome plantuml picture is shown as a broken file. However when I click on the icon it shows correctly.
Could anyone help me, please?
Sara

Chrome’s default settings don’t show “http” images embedded in sites created with “https”.
If you want to solve the problem for all users, change the plantuml server to supports https (I do not know how to do that).

If you want to solve the problem personally, please change the setting of chrome. Show chrome://settings/content/siteDetails?site=https://YOUR GITLAB URL/ , and , “Insecure content” to allow.

If you want to solve the problem for all users, change the plantuml server to supports https (I do not know how to do that).

https://docs.gitlab.com/ee/administration/integration/plantuml.html#configure-local-plantuml-access