error in (agm-core.js:299:31) when using @Agm/core

[MhmdWishah]

get the error in (agm-core.js:299:31) while i using @Agm/core components

pages-routing.module.ts:54 ERROR TypeError: Cannot read properties of undefined (reading 'then')
at Ae._subscribe (agm-core.js:299:31)
at Ae._trySubscribe (Observable.js:37:25)
at Observable.js:31:30
at l (errorContext.js:19:9)
at Ae.subscribe (Observable.js:22:9)
at agm-core.js:1543:96
at Map.forEach ()
at Te._registerEventListeners (agm-core.js:1542:16)
at Te.ngOnInit (agm-core.js:1493:14)
at U (core.mjs:2434:22)

Originally posted by @MhmdWishah in #1892 (comment)