Media Gallery is missing (2.6.1)

[iamgeert]

Issue:
Media Gallery is missing from (Content > BLOG (posts) > Add New Post)

Steps to reproduce:
Magento 2.2.1
PHP 7.1.x
Magefan Blog 2.6.1 (updated 2.5.3 -> 2.6.1)
Redis/Varnish
Add a new blog post and add a media gallery

Expected result:
Media Gallery is displayed to add a photo gallery to the post

Actual result:
Media Gallery is not showing (Content > BLOG (posts) > Add New Post)
Media Gallery on older posts is displayed correctly on frontend, editing is not possible in the backend.

[magefan]

@Geert82, it issue already fixed 6f6bc3b. This fix will be included in next release.