Please check following pointers :
1. Check php error log if there is any errors is appearing in site .
2. Disable the plugins that you feel not necessary for your website .(like if you doe not want events in site then disable the eventon and its wplms addon ) .Lesser plugins will increase the site speed as plugins create more load on server .
3. Make sure that wordpress ,wplms theme and all its plugins are updated to latest .
4. Try setting a new setup on localhost .
5. Install query monitor plugin to check which plugins is taking too much load .
Hi Alex,
I am attaching my errorlog. Can you please give me some direction.
Regards
It seems file esceeds allowed upload size .
you can upload it online and can share link of that(may be in dropbox) to check the error log .