Buttons (SiteOrigin) and other style adjustments not showing

For some days I experience missing css? Or style on my website. Also the SiteOrigin Buttons are not showing. I see just the text wich was in the button.

The website is https://www.machulp.nu . Does anyone know about this small issue?

Location of one of the former buttons: 43

And this text is more large then it shout be:

Hello, and sorry for delay.

Please create a separate topic for each of your issues (if they are still actual) to keep forum in good order and make it easier to help you. Hope for your understanding.

Kind Regards, Roman.