I am recieving the following error when saving a lead record - Error: Invalid Data. 
Review all error messages below to correct your data.
Apex trigger Lead caused an unexpected exception, contact your administrator: Lead: execution of BeforeInsert caused by: line 7, column 4: trigger body is invalid and failed recompilation: Method does not exist or incorrect signature: LeadTriggerHandler.TriggerBeforeInsert(List)

I cant seem to find the source of the issue - any ideas?

Hi,

I am working on a new project to show images on a record that is stored in a externally from salesforce itsef i.e. Dropbox 

When a record is opened I would like the image to be loaded from dropbox at the top of the record.

I am recieving the following error when saving a lead record - Error: Invalid Data. 
Review all error messages below to correct your data.
Apex trigger Lead caused an unexpected exception, contact your administrator: Lead: execution of BeforeInsert caused by: line 7, column 4: trigger body is invalid and failed recompilation: Method does not exist or incorrect signature: LeadTriggerHandler.TriggerBeforeInsert(List)

I cant seem to find the source of the issue - any ideas?