Unable to Remove Technician + Java Error's on Logon

Unable to Remove Technician + Java Error's on Logon

Unable to Remove Technician + Java Error's on Logon

I've upgraded to 7.5 but we are getting numerous java error's on logon and i'm unable to remove a technician from the system, its removed all his detail, but he is still listed and i'm unable to add a new technician due to licensing .

On logon we get error's about missing .png files we refresh and then servicedesk semi loads and then we refresh again and it loads ok.

I get loading please wait (all the time) while in admin section and opening technician details.

then i get Exception document.getElementbyID ("canapproveholder") is null

also get loads of other messages which disappear before i can read them all - unable to fetch login details is part of it.

Can anyone advise on how we make sure the tomcat is working correctly or if this is DB specific.

Regards
Matthew