I have opened a current document in which I already wrote some formulae on the old version. Now I am unable to edit those or create new formulae. When I click on insert formula I get a box in the document in which the formula would appear but the formula editor does not appear and there is no way of editing it. Similarly when I click on the old formulae I already have I cannot edit them.
Thanks for bugreport Please, verify if in last version of LibreOffice still reproducible
Sorry but I no longer have the file to check so cannot verify.
Do not hesitate to reopen if this bug is reproducible with the latest stable release.