error whiile adding fire base into ng app

Question

i am installing firebase into my ng app but encountering this issue when i add in imports array as shown in the documentation enter image description here Type 'ModuleWithProviders' is not assignable to type 'any[] | Type | ModuleWithProviders<{}>'. Type 'ModuleWithProviders' is not assignable to type 'ModuleWithProviders<{}>'. Types of property 'providers' are incompatible. Type '(Provider | EnvironmentProviders)[] | undefined' is not assignable to type 'Provider[] | undefined'. Type '(Provider | EnvironmentProviders)[]' is not assignable to type 'Provider[]'. Type 'Provider | EnvironmentProviders' is not assignable to type 'Provider'. Type 'EnvironmentProviders' is not assignable to type 'Provider'.

Type 'ModuleWithProviders' is not assignable to type 'any[] | Type | ModuleWithProviders<{}>'. Type 'ModuleWithProviders' is not assignable to type 'ModuleWithProviders<{}>'. Types of property 'providers' are incompatible. Type '(Provider | EnvironmentProviders)[] | undefined' is not assignable to type 'Provider[] | undefined'. Type '(Provider | EnvironmentProviders)[]' is not assignable to type 'Provider[]'. Type 'Provider | EnvironmentProviders' is not assignable to type 'Provider'. Type 'EnvironmentProviders' is not assignable to type 'Provider'.