Please help us help you and fill where relevant:
LimeSurvey version: 6.15.5
Own server or LimeSurvey Cloud: Cloud
Survey theme/template: default
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I use the button "selected response(s)" below the responses frequently. Last Tuesday it suddenly stopped working and it does not work until this day. When you select several responses and you wish to push the button "Selected response(s)" the available functions does not open, only small plain white rectangle appears. I changed browser, used chrome, edge, mozzila, and it does the same.
Please, fix it. I

I think nothing just stops "suddenly". There must have been a change. Was there an update to your installation on Tuesday?

From what I understand, you are not using the community edition, but the SaaS service provided by the Limesurvey GmbH?

Please, fix it.

This forum is mainly maintained by volunteers: users helping users. If you feel that this is a bug that was introduced you have two options:

1. Create a bug report (bugs.limesurvey.org)
2. If you are a paying customer of Limesurvey GmbH (e.g. you pay for the hosted version of Limesurvey Pro), you can also open a support ticket with the Limesurvey GmbH.

I would do both.