Error when trying to change size of calendar

Hello Everyone

Here is error i got when trying to resize calendar for my webbpage:

There was error during configuration saving. Last stable configuration restored.
Error report saved to “com_scheduler_log.xml”

What should i do to fix it ?

Thank You.


This is for joomla…

Try to find file

Attach it here, please.
Some error occurs when you try to save any changes in configuration.
It doesn’t related to only scheduler size.