I have been using LibreOffice for years, both on Ubuntu and Windows machines. It is one of my favorite applications, very stable and excellently designed. I installed today version 7.1.0, which as clearly stated is an early version and under development. I have been installing early versions as soon as they appear for years, and have never faced any problem. This time my Calc application would not open the .ods file i was working on before, with version 22.214.171.124(x64). I was forced to reinstall 7.0.4, in order be able to continue working.
Contact me if you would like a copy of the file in order to correct the error.