Custom Post Type not editable

WordPress 5.1.1
GeoDirectory 1.6.38
GeoDirectory Custom Post Types 1.3.8
Theme: Enfold by Kriesi

Hi,

first of all thanks for this great plugin. I am impressed every day again with the tons of features it offers.

But now there is an issue:

Custom post type is available in frontend but in admin’s backend the content is not displayed at all and there is no way to edit it anymore.

Firefox-Konsole:

JQMIGRATE: Migrate is installed, version 1.4.1 load-scripts.php:8:542
onmozfullscreenchange sollte nicht mehr verwendet werden. components.min.js:12:80821
onmozfullscreenerror sollte nicht mehr verwendet werden. components.min.js:12:80821
ReferenceError: geodir_all_js_msg is not defined[Weitere Informationen] on_document_load.min.js:1:643
J-VERSION: 2.1.4 page.js:25:2
JUI-VERSION: 1.11.4 page.js:26:2
Mutations-Ereignisse sollten nicht mehr verwendet werden. Verwenden Sie MutationObserver stattdessen. jquery-2.1.4.min.js:3:3704
Attached to 2 forms page.js:199:3
Attached to 0 submit elements page.js:215:3
whatShouldIDo on domain.com page.js:239:3
info object is empty page.js:273:7
Triggering delayed handleDomChange-Handler page.js:1852:5
No additional forms detected page.js:190:4
Checking if we have recorded submit-infos for domain.com / domain.com page.js:384:3
No recorded login-info for domain.com

Any idea what to do now?

Best regards
Rolf