Collabora internal link option "target in document" seems not to work

Hello everybody, I’ve tried to create an internal link in an excel sheet using the demo.nextcloud.com area. I selected the “link” option and then the “target in document” option, but the system does not allow me to select any “target in document”. At last: the link option doesn’t seem to work. Please, can you give me some hints to solve the issue? Kind Regards. Andrea

Hello. I see no answer to this question. Is the pb solved ?
I have the same pb with PPT and Word. Its works well with Outlook.
What can we do ?
Thanks for your answer. Kind regards, Virginie