Can I use LO with CentOS 7.6 or Scientific Linus 7.6

Delete default LibreOffice version (yum remove libreoffice*)
Install libreoffice (no problems)
Open write, calc etc.
Starts briefly and then dies

Previous versions functioned flawlessly.

Try running application from a command line window and check the output. I would not be surprised if you see some error messages that help explain the issue. Likely problem is a missing library or an incompatibility.

From the command line, execute the command: libreoffice