com.google.gwt.event.shared.UmbrellaException:

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#1

How can I fix ?

notes = Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36
foundIn = 1.5.1-Fenix
faultData = com.google.gwt.event.shared.UmbrellaException: Exception caught: (TypeError) : Cannot read property ‘g’ of null
projectId = -1

#2

Delete that project after taking a backup.

#3

Then what to do next?

#4

notes = Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.159 Safari/537.36
foundIn = 1.5.1-Fenix
faultData = java.lang.IndexOutOfBoundsException
projectId = -1

This occured