I can not move an image within LibreOffice and don’t know what the reason is.
Upload a sample file, information is insufficient.
Add to your original question and don’t create a new question. For uploading I upvoted you so that you hopefully can upload your file.
@Grantler, Karma of 1 is sufficient for upload files. See AskLibO: How many "karma" are required for …? 2020
@youerhard, Take a look at LibreOffice Help on Image Protect and Anchor.
Add Answer is reserved for solutions. Press edit below your question to add more information, and use the paper clip to upload a file.