I do not see a reason why it should not work anymore. 

Here http://www.tinywebgallery.com/blog/ on the right side I have 3 random images which should do what you want. And they work fine in Chrome. 

Do you have an example where it is included? 

Best regards,

Michael

https://www.wegraceforum.nl/topic/4142/22 and

https://www.saabforum.nl/viewtopic.php?f=43&t=75923&start=180

I tried to use your no border example picture on both sites in Chrome and they are showed.

http links will not be shown in https sites. You need to change TWG to https.

Best regards,

Michael

gertram.nl/display/image.php?twg_album=900_B201I_1988&twg_type=small&twg_show=DSC01183.JPG&twg_rot=-1 is shown if you open it in a new tab.

Best regards,

Michael

Finally taken some time to convert to https but not succesfull up untill now.

Got a free Let's Encrypt certificate from the DirectAdmin of my host.

Looks like I posted the previous accidentally with a combination of keys, tried to modify but got a message I've taken too long to edit. I'll type it again.

After saving the certificate it should be in affect immediately. I found a couple of manuals on how to change the htaccess file in order to change all traffic to https. In the htaccess there was originally:

Options -Indexes +ExecCGI
AddHandler cgi-script .cgi .pl

I tried to combine this with the redirects I found on the internet, also tried without to original script:

RewriteEngine On
RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$  https://www.yourdomain.com/$1  [R,L]

and:

RewriteEngine On
RewriteCond %{HTTPS} !=on
RewriteRule ^/?(.*) https://%{SERVER_NAME}/$1 [R,L]

I also tried the standard check box in DirectAdmin "Force SSL with https redirect"
but none worked.

Please advise.

Just one setting needed to be changed in Directadmin. Domain Administration -> Click on desired domain -> Check "Use a symbolic link from private_html to public_html - allows for same data in http and https" -> Save

So it works now?