Steps to reproduce the issue

Hi dear all>
When i want to update my joomla site I have got this message
"Warning
JInstaller: :Install: Error SQL Can't DROP 'idx_image'; check that column/key exists
Files Update: SQL error file DB function failed with error number 1091
Can't DROP 'idx_image'; check that column/key exists
SQL =
ALTER TABLE #__languages DROP INDEX idx_image;
".
and my web site has crashed to be like this: I have uploaded screenshot from my web site

Expected result

Actual result

System information (as much as possible)

Additional comments