Moderator
t-p
(@t-p)
I have tried all my possible ways
It will be helpful to tell us what you have done so far!
Have you performed a theme/plugin conflict test? You would deactivate all your plugins and if the issue doesn’t occur then you would activate one plugin at time to find which plugin is causing the problem. If disabling all the plugins doesn’t help you’ll also want to try changing to default theme such as Twenty Fifteen to see if the theme is causing the issue.
@tara & @richard
I have uninstalled all the plugins and changed to default theme. Then after this I have tried to re install once again but UNLUCKY.
Moderator
t-p
(@t-p)
then this is a site-specific issue.
– check your settings in the dashboard
– if all seetings pertainng to the editor are okay, try reviewing this codex: http://codex.wordpress.org/Using_Your_Browser_to_Diagnose_JavaScript_Errors
– if that does not help, try increasing memory available for php.