EPiServer TinyMCE not creating link from CustomMediaRepository

Hi,

I have created custom media directory and configured local media provider but when i create file link in TinyMCE and select file from my LocalMedia directory and publish. Link becoms blank.  I think it is somethig with TinyMCE in EPiServer 11+.  File Links in TinyMCE from regular Media works fine.

We're using this solution in our project and it has been working fine in version 10+ but After upgrading to CMS 11.13.1 the link selection dialog is shown blank

I would appreciate any help.

Thanks:)