Confusing linting

Getting the following warning:

deno-ts: This member must have an 'override' modifier because it overrides a member in the base class 'the class name'

deno-ts: This member must have an 'override' modifier because it overrides a member in the base class 'the class name'

Then I add the override:

deno-ts: This member cannot have an 'override' modifier because it's containing class 'the class name' does not extend another class

deno-ts: This member cannot have an 'override' modifier because it's containing class 'the class name' does not extend another class

No idea what to do here. I'm definitely overriding methods so the first warning should be correct