Hello,
It is a stable release
Do a test with default joomla site template Protostar to see if any error.
Turn on too the error reporting of Joomla on Maximum, just a short time to check and screenshot the page with error. (turn off back after the error reporting).
This could give information on why you've got an issue, and where it could come from.
Best regards,
Cyril
Sorry, i speak only French and English.