Cannot set property innerhtml of null. Cannot read properties of null. null undefined. cannot read properties of null (reading 'getcontext'). uncaught typeerror: cannot read properties of null (reading 'addeventlistener').

Cannot set property innerhtml of null. Cannot read properties of null. null undefined. cannot read properties of null (reading 'getcontext'). uncaught typeerror: cannot read properties of null (reading 'addeventlistener').
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