Q1. Is Java version 8, update 271 correct to use with LO and Mac OS 11.0.1? Q2. If Java V8/271 is incorrect, what is the correct version?

Libre Office, on Macbook pro OS 11.0.1, with Java Version 8, update 271.

Base unusable owing to several different Libre Office Java-related error messages which occur when trying to enter data/edit Table.

Have not included error messages (have screen shots), as am hopeful that answers to the 2 questions will resolve problem. (Also, I’m unsure at the moment how to include screen shots.)

How to install Java (JRE/JDK) so that LibreOffice could use it?

Hello, It is my understanding that JDK 12 works for your OS. See also this post → “LibreOffice requires a Java runtime environment (JRE) to perform this task. The selected JRE is defective.”

BTW - When asking (or editing) a question or giving an answer, there is a toolbar in the upper left area. On that toolbar is an icon for posting images (left of paperclip).