error in registration module

When using Contao's registration module, while cm_membergooglemaps is installed (wich also installs cm_googlemaps), the following error occurs:
Error:
Call to protected method ChrMue\cm_GoogleMaps\HelperGM::getGMGeoData() from context 'tl_cm_memberlist'

  at vendor/chrmue/cm_membergooglemaps/dca/tl_member.php:314
  at tl_cm_memberlist->createNewUser('803', array(...), object(ModuleRegistrationExtended))
     (vendor/contao/core-bundle/src/Resources/contao/modules/ModuleRegistration.php:432)
  at Contao\ModuleRegistration->createNewUser(array(...))
     (vendor/contao/core-bundle/src/Resources/contao/modules/ModuleRegistration.php:330)
  at Contao\ModuleRegistration->compile()
     (system/modules/xtmembers/modules/ModuleRegistrationExtended.php:38)
  at Contao\ModuleRegistrationExtended->compile()
     (vendor/contao/core-bundle/src/Resources/contao/modules/Module.php:215)
  at Contao\Module->generate()
     (vendor/contao/core-bundle/src/Resources/contao/modules/ModuleRegistration.php:57)
  at Contao\ModuleRegistration->generate()
     (vendor/contao/core-bundle/src/Resources/contao/elements/ContentModule.php:78)
  at Contao\ContentModule->generate()
     (vendor/contao/core-bundle/src/Resources/contao/library/Contao/Controller.php:474)
  at Contao\Controller::getContentElement(object(ContentModel), 'main')
     (vendor/contao/core-bundle/src/Resources/contao/modules/ModuleArticle.php:193)
  at Contao\ModuleArticle->compile()
     (vendor/contao/core-bundle/src/Resources/contao/modules/Module.php:215)
  at Contao\Module->generate()
     (vendor/contao/core-bundle/src/Resources/contao/modules/ModuleArticle.php:75)
  at Contao\ModuleArticle->generate(false)
     (vendor/contao/core-bundle/src/Resources/contao/library/Contao/Controller.php:414)
  at Contao\Controller::getArticle(object(ArticleModel), true, false, 'main')
     (vendor/contao/core-bundle/src/Resources/contao/library/Contao/Controller.php:273)
  at Contao\Controller::getFrontendModule('0', 'main')
     (vendor/contao/core-bundle/src/Resources/contao/pages/PageRegular.php:176)
  at Contao\PageRegular->prepare(object(PageModel))
     (vendor/contao/core-bundle/src/Resources/contao/pages/PageRegular.php:49)
  at Contao\PageRegular->getResponse(object(PageModel), true)
     (vendor/contao/core-bundle/src/Resources/contao/controllers/FrontendIndex.php:351)
  at Contao\FrontendIndex->renderPage(object(PageModel))
     (vendor/symfony/http-kernel/HttpKernel.php:150)
  at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
     (vendor/symfony/http-kernel/HttpKernel.php:67)
  at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
     (vendor/symfony/http-kernel/Kernel.php:198)
  at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
     (web/app_dev.php:83)
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