Hey there, @lesi2000! Thanks for contacting us. I’m happy to help you.
Are you able to share some screenshots of the errors so we can take a better look? I recommend using https://snipboard.io. You can share the direct link to the image as a response to this topic.
Just to confirm, both devices you mentioned had the exactly same Operational System and Chrome version and still one had the issue and the other didn’t, right?
When you are able to see the issue on a browser, are you always able to see it on that browser or it can sometimes show correctly there? What about different browsers on the same device?
Regarding having a full conflict test by deactivating all plugins, there are ways to test it without changing the site, but first, I’d like to understand your site properly. Please share with us the necessary information below for us to investigate the issue further:
System Status Report which you can find via WooCommerce > Status > Get system report > Copy for support.
Fatal error logs (if any) under WooCommerce > Status > Logs. Then you can use the selector to search for Fatal Errors.
You could copy and paste your reply here or paste it via https://gist.github.com/ and send the link here.
Looking forward to your reply.
Have a wonderful day!