First of all i shall start with some common errors:
White screen
Stopping halfway through load
Not working
Java not running
freezing
not being able to change veiw
frozen sections
wrong combat level
wrong total level
Other;
Solving:
Most of these can be solved by refreshing the client a few times.
White screen - refresh
Stop loading - Refresh (2-3 times if needed)
Not working - check your silab cache (try doing a system restore)-(does not affect major files)
Java not running - Try refreshing client and if or redownloading your java(get latest version)
Freezing - Refresh client
Not being able to change veiw - Refresh client
Frozen Sections - Refresh client
Wrong combat level - Refresh client
Wrong total level - Refresh Client
Other-
Most other problems can be solved by refreshing (2-3 times) or redownloading your client or java(latest) if problems persist try a system restore or a new comp.
Refreshing - if refreshing once on a webclient leads to it not loadingm refresh 2-3 times until it does, silabs not reliable lol

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Any other problem submit here.