Fatal Error: Call to undefined function cmb2_get_option() … on line 427

Good Day! I've had the problem for some time that I can't use the customizer. There comes the following error message: Fatal error: Call to undefined function cmb2_get_option () in / customers / 299554_27619 / 2016 / wp-content / plugins / google-maps-builder / vendor / wordimpress / maps-builder-core / includes / admin / class-gmc-settings. php on line 427 I have all updates up to date and also the Catch Base Pro is installed with the version 3.9.2. I have no further ideas, maybe someone can help me here. Best regards, Jan