Please help us help you and fill where relevant:
Your LimeSurvey version: [see right hand bottom of your LimeSurvey admin screen]
Own server or LimeSurvey hosting:
Survey theme/template:
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I am attempting to add an attachment to a survey invite but when I click the relevant button at the bottom of the "Edit email template" page the screen freezes and cannot be recovered. This has occurred repeatedly all day and I have tried both MS Edge and Google Chrome. I have cleared cookies and tried restarting the various browsers. I have also recreated the invite several times but no joy. 

The behavior can be seen in the attached MP4.

You did not respond which Version of LS you are using.

And responders in the forum usually do not want to download a Zip file to understand your problem.

 I am using the latest online version, which is to say that I am NOT hosting it myself. I upgraded to the latest version this morning. I can understand a reluctance to download a Zip file but I don't have another way of sharing a video. At any rate, the problem is with the button described in the original message.

Eric

I am using the latest online version, which is to say that I am NOT hosting it myself. I upgraded to the latest version this morning.

The "latest online version" unfortunately doesn't really help. The latest this morning might not be the latest this afternoon. And then there are currently 3 different supported branches of Limesurvey (LS3, LS5, LS6), so there are currently 3 different "latest" versions at any given time.

So you could have just written 6.3.0 (which can be seen in your screenshot at the bottom right).

The fact that you are "not hosting yourself" also doesn't help much, it would be important to know who is hosting (there are other companies that host Limesurvey and often people in the forum think that if their university or their employer is hosting, that it is "Limesurvey Hosting"). But also in your screenshot I can see the URL and that leads me to the conclusion that your installation is hosted by the Limesurvey GmbH through their SaaS offer.

As you are paying customer of the Limesurvey GmbH I recommend to open a support ticket directly with them (Go to the website, click on Support, do not let you redirect to the forum... ).

The forum is almost exclusively users helping users with the Community Edition of Limesurvey and we have no access nor insights into the servers of Limesurvey GmbH. So I think it is best to get in touch with them directly via a support ticket.

Of course, for anything we can help with in the forum, you can still use the forum for support (e.g. questions on how to do certain things in Limesurvey, etc). But I think in this specific case it doesn't make sense for us to try to trouble shoot in the forum, while the Limesurvey GmbH has access to the servers, etc, which we do have not and might have to do a lot of guess work.

holch wrote:

I am using the latest online version, which is to say that I am NOT hosting it myself. I upgraded to the latest version this morning.

As you are paying customer of the Limesurvey GmbH I recommend to open a support ticket directly with them (Go to the website, click on Support, do not let you redirect to the forum... ).
 

+1 !